8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021) (2023)

The best outboards are the ones able to produce enough power in order to send your boat towards your destination very easily and as quickly as you need. They have to work smoothly and experience no issues. But in order to maintain them and make sure they are functioning the way they should, they need the right type of oil.

Were you aware of the fact that the best 2 stroke outboard oil can make a difference when it comes to the well-functioning of your outboard motor? It will ensure that you have an efficiently and smoothly running outboard, thus preventing issues with it while you’re on the boat.

That being said, we decided to give you a hand by offering you some information on how to choose the best outboard oil. We’ll also give you some good products to choose from. Let’s get started!

Contents show

Best 2 Stroke Outboard Oil Comparison Chart

8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021) (1)

Lucas Oil Semi-Synthetic 2-Cycle Oil

  • Price: $$
  • Size: 1 Gallon
  • Provides: Prevents carbon deposits
  • Type: Semi-Synthetic
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8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021) (2)

Quicksilver Premium Plus Two-Cycle TC-W3 Oil

  • Price: $$
  • Size: 1Gallon
  • Provides: Fighting rust deposits in the combustion chamber
  • Type: Synthetic Blend
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8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021) (3)

Pennzoil Marine Premium Plus Outboard 2 Cycle Oil

  • Price: $
  • Size: 1Gallon
  • Provides: Guard against harmful engine deposits – Protect against piston-scuffing
  • Type: Synthetic Blend
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8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021) (4)

Evinrude Johnson E-TEC XD 100 Synthetic Formula 2

  • Price: $$$$
  • Size: 1Gallon
  • Provides: Maximum detergency – Reduce wear and friction
  • Type: Synthetic
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8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021) (5)

YAMAHA Yamalube 2M Marine 2-Stroke Oil

  • Price: $$$
  • Size: 1Gallon
  • Provides: Superior anti-wear and anti-corrosion protection
  • Type: Semi-synthetic
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8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021) (6)

Royal Purple HP 2-C High Performance 2-Cycle Oil

  • Price: $
  • Size: 1 Quart (32 Ounces)
  • Provides: Exhaust ports and spark plugs are clean all the time
  • Type: Synthetic
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8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021) (7)

Red Line 2-Stroke Race Oil

  • Price: $$$$
  • Size: 1Gallon
  • Provides: It doesn’t allow any deposits to occur on the piston crown and the combustion chambers exhaust ports upper ring
  • Type: Synthetic
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Best 2 Stroke Outboard Oil Reviews (Updated List)

1. Lucas Oil Semi-Synthetic 2-Cycle Oil

8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021) (8)You need a good oil that isn’t harmful to your outboard, in which case this Lucas Oil is just what you need in your life. The one thing that made us love this oil is how it prevents carbon deposits. If you were worried about them or experienced this problem with other oils in the past, you’ll be more than happy to know it won’t be the case with this product.

Also, you’ll have the advantage of having it mix well with gasoline at all temperatures, which makes it more versatile overall. This oil is suitable for all liquid-cooled tow-smoke engines, as well as lower specific output air-cooled engines that work under all operating conditions. If you need something to use with an oil injection system where there’s no need for fuel-oil premixing, then this product is right for you.


  • Can prevent exhaust port blocking because it was designed to prevent carbon deposits
  • You can use it with oil injection systems with no fuel/oil premixing
  • Meets requirements for “low smoke” oils
  • It can be mixed with gasoline at any temperature


  • You may receive a defective bottle that leaks

2. Quicksilver Premium Plus Two-Cycle TC-W3 Oil

8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021) (9)For your peace of mind, you might need this Quicksilver oil in your life, since you most likely want your outboard to always have a proper performance. Aside from helping your outboard engine run nicely, it also has the advantage of fighting rust deposits in the combustion chamber, as well as the intake and exhaust passages. Also, to make sure your outboard is even better maintained, there will be no carbon deposits either. The oil was made in such a way that there will be less smoke, and carbon deposits will be prevented.

If you need amazing lubrication for your outboard and don’t want to spend money on a new one or spend cash to repair your existing one, this product is great.


  • Great oil if you want to lubricate your outboard and maintain it
  • It doesn’t cause any carbon deposits, but rather prevents them
  • It fights rust deposits
  • Doesn’t produce any smoke


  • It may be a bit expensive

3. Pennzoil Marine Premium Plus Outboard 2 Cycle Oil

8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021) (10)You need something that keeps your outboard engine clean all the time. In that case, Pennzoil might have just the product you need. This oil was made to keep your marine engine running clean at all times, thus ensuring you will not have your boat stop in the middle of nowhere. But the benefit comes from the fact that you can use the oil for something else as well, as it’s a multipurpose-gear oil. That gives it some versatility, which is amazing.

Also, we were impressed to see how good the product is against carbon deposits. It doesn’t allow them to form, whether it’s in the combustion chamber, piston tops, or under the piston-combustion rings or crowns.

The oil will be able to protect the outboard engine under the most severe operating conditions, which is why it’s worth a shot. If you want to make your outboard engine more durable, then this oil can help out.


  • It can protect your outboard engine, even if it’s under severe operating conditions
  • It’s a multipurpose oil
  • Prevents the formation of carbon deposits
  • Will keep your engine running clean all the time


  • Can be quite expensive

4. Evinrude Johnson E-TEC XD 100 Synthetic Formula 2

8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021) (11)When you own an outboard, one of the worst is having the oil cause smoke. However, with this Evinrude Johnson oil, you will not have to deal with this issue. The maximum detergency can reduce combustion deposits, so it produces no smoke while your engine is using it. Besides, it doesn’t have any odor, and no ash will be left behind either, which is even better.

If you want to reduce wear and friction, then this product can help a lot in this regard. It can lubricate the engine, and have it run smoothly. This means that it won’t have to force itself and will thus not cease to work. The motor will start working instantly. It’s not that expensive either so you don’t have to worry about spending too much on it. The bottle is secure, and no leaks will occur.


  • Will help your engine start working instantly
  • Your outboard engine will work in a smoother way
  • Pocket-friendly
  • Doesn’t allow combustion deposits to occur
  • No smoke will be produced
  • Odorless


  • Some clients received a product that was not as pictured

5. YAMAHA Yamalube 2M Marine 2-Stroke Oil

8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021) (12)It’s always important to ensure the durability and well-functioning of your outboard engine, in which case you need good oil for it. Yamaha brings you just the proper product, that will ensure you will have a long-lasting outboard engine. It was made in such a way that it doesn’t allow corrosion, nor wear. In fact, it will protect it against these issues, making sure you will not have to break the bank for reparations or a new engine.

The cool thing is that this product is suitable even for harsher environments. However, it shouldn’t be used with Sport Boats, WaveRunner or for land-based products.

If you want your engine to start instantly after you are turning the outboard on, then you should consider this product. It will make your outboard start immediately, even if it’s been sitting unused for months.


  • Can help your outboard start instantly
  • Will save you a lot of repair bills because it increases the durability of the unit
  • Will prevent wear and corrosion
  • Can be used in harsher environments too


  • It’s pretty expensive

6. Royal Purple HP 2-C High-Performance 2-Cycle Oil

8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021) (13)Do you want to make sure your exhaust ports and spark plugs are clean all the time? If that’s the case, this Royal Purple product will give you peace of mind in this regard. This oil is able to keep them clean thanks to the synthetic solvency. As such, you can be sure that it won’t allow anything bad to happen to your engine.

You can use it in both oil and pre-mixed gasoline two-cycle engines in outboard motors. It can also be used in jet skis, chain saws, motorcycles and more, so it’s a very versatile product, this being another advantage.

It’s also able to reduce wear and improve performance, of course. If you use it, you will notice that your outboard will run in a much smoother manner.


  • Can be used for premix in snowmobiles too, but only in temperatures lower than 20 degrees Fahrenheit
  • Makes engines run better
  • Very versatile, as it can be used for outboards, motorcycles, jet skis, and many others
  • Spark plugs and exhaust ports will stay clean at all times


  • For a 2 cycle oil, it can be a little too pricey

7. Red Line 2-Stroke Race Oil

8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021) (14)Considering how important it is to keep your outboard engine clean, you would love this Red Line oil. One of the biggest benefits is that it doesn’t allow any deposits to occur on the piston crown and the combustion chambers exhaust ports upper ring. That being said, you will rest assured that your outboard will have a good performance, without any problems that would make it stop functioning.

There isn’t too much smoke produced, which is even better. Also, while it’s recommended to use at 50:1, it can work up to 100:1, but it depends on the operating conditions. The product contains ester base oils, which adds more strength and affinity for hot metal. It’s compatible with reformulated fuels as well. If you want to keep your outboard in good condition, this oil can make a big change.


  • Can be used up to 100:1 in some cases
  • Has more affinity and strength for hot metal
  • Will prevent any deposits
  • Doesn’t produce too much smoke


  • It isn’t that good for brand new engines

8. Mercury 2-Stroke Outboard Oil Optimax Case

8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021) (15)If you are looking for a product that cares for your direct fuel injection (DFI) engine, look no further. The Mercury 2-Stroke outboard oil provides increased lubricity, reduces smoke, carbon deposits, and protects the motor.

Your engine will improve performance, and will fall in love with it. It will reduce pollution and optimize consumption. So, looking at the big picture, even if you don’t manage to find a good deal on purchasing, you will still save money in the long run and, most importantly, take good care of your engine.

Since these engines are more demanding, Mercury has concentrated on developing this new synthetic brand to meet all pretentiousness. A typical gas to oil 50:1 ratio is suitable and recommended for all Mercury Optimax engines except the racing versions.


  • Fast shipping
  • It will reduce the carbon deposits to a minimum
  • Explicitly developed for DFI engines
  • It is worth the money because the engine uses it very economically


  • The product might be pricy, but good deals are often available

TC-W3 Oil – What Is It and Why It’s Needed

To understand what TC-W3 oil is, you have to take a look at all the components in its name and understand them. Basically, TC is short for two-cycle, meaning that the oil is a two-cycle one. The W comes from the fact that the oil is water-cooled, whereas the 3 means that it is the 3rd formulation of oil for a two-cycle, water-cooled engine.

This oil formula has been made in order to keep outboard engines running strong while reducing the bad impact they have on the environment. Although many people thought the oil-fuel mixture would be forgotten as it’s harmful to nature, some brands came up with the idea to create a formula that protects the environment too. That being said, the TC-W3 oil formula was born.

What Features You Should Consider When Shopping for 2 Stroke Outboard Oils

It’s always important to be well-informed before going shopping because otherwise, you risk ending up with an improper product. After all, you can’t get a 4-stroke oil for your 2-stroke engine. So, no matter if you’re looking for marine battery chargers or even a new motor, you must be properly informed.

So, keep in mind that the best oil will keep your outboard strong and durable. Here are some features to take into account before you get that new 2 stroke outboard oil.

  • Price

You will notice that prices vary for 2 stroke outboard oils, depending on how good they are, or where you get them from. Sadly, many of them tend to be overpriced. While in some cases the price is well-deserved, some products tend to raise prices while the product leaves much to be desired. When you look for outboard oil online, the best thing to do is to check the reviews and see if the price is worth it. If the price is too high yet people are complaining about the results, it’s best to avoid that product.

  • Synthetic or not?

Even 2 stroke outboard oils come in multiple types, believe it or not. You need to think well about the type of oil your outboard will need, especially if you want to maintain it and keep it working for a long time, saving on reparation bills.

One of the types is synthetic two-stroke oil. It has a lot of benefits for 2-stroke outboards because it can provide some extra lubrication and increase combustion. To make things even better, this oil can keep your engine clean. Every part of the outboard will be clean, even the nuts, bolts and piston. This oil can be quite pricey, though.

If you don’t get a synthetic one, there will be more risk for your outboard and you may have to either repair it quite often or look for a new one when it stops operating properly.

8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021) (16)

  • Non-Smoke and Odorless

The last thing you want from your outboard is for it to produce smoke, whether you’re using 2-stroke or 4 stroke outboard motor oil. Smoke is usually caused by a two-stroke oil buildup that settled on the crankshaft area’s bottom. That’s exactly where your engine is situated, and it means the fuel has been burnt on combustion. That will cause a lot of smoke, and a bad smell too, and you want to prevent that.

This is why you must look for an oil that prevents the apparition of smoke. Many products specify this feature in the description, but it’s also best to check the reviews too and ensure it works before you actually buy the oil.

  • Versatility

Although 2-stroke outboard oil is meant to only be used for outboards, there are oils that can be used for other motors as well. Having said that, some oils can work for your motorcycle, jet skis and many other units. If you find an oil that is suitable for those units as well, that’s even better.

  • Certification

As with everything related to marine equipment, you need something of high-quality. In this case, certification is something to take into account. It’s important to check whether your oil carries either a Jaso FD or an ISO-I-EGD certification. Although you can also settle for a cheaper one with API-TC standards, it’s better to go for something safer.

What Are the Pros of Using 2 Stroke Outboard Oil?

8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021) (17)It’s always important to know the benefits of using 2 stroke outboard oil, especially if you want to pick a good one. As such, here are the pros that come with this outboard oil type:

  • It Prevents Buildup

Isn’t it annoying when you get carbon buildup in your engine? This will force it to function and could potentially stop the engine from working altogether. You don’t want to spend money on reparations or a replacement, so a good oil will work to prevent buildup. This is what 2-stroke outboard oil can do.

  • Helps the Unit Run Smoothly

If you’re tired of the amount of time it takes for your outboard to start, you’ll be happy to know that 2-stroke outboard oil can prevent this from happening. It will help the engine run in a smooth manner, making sure there are no delayed starts and that you experience no performance issues with it.

  • It Will Prevent Gas Oxidization

You may be tired of gas oxidizing in the engine, which is why 2-stroke outboard oil might be the right choice for you. Since the oil contains fuel stabilizers, it will make sure there will be no oxidization, so your engine will be in good condition all the time.

Wrap Up

Your outboard engine cannot run properly unless you use the right oil – in which case, a 2 stroke outboard oil is a must. Picking one might be difficult though, as there are so many brands and types of oil to choose from. That being said, we hope this guide has helped you, and now you can choose the best 2 stroke outboard oil.


8 Best 2 Stroke Outboard Oil - (Reviews & Buying Guide 2021)? ›

Our Verdict. Our top pick for the best 2-stroke oil is the Lucas Oil Semi-Synthetic 2-Cycle Oil. It comes in a wide range of different sizes and works well in a number of different 2-stroke engines. If you're looking for our best value pick, check out the Pennzoil Marine XLF 2-Cycle Oil.

What is the best oil to use on a 2-stroke outboard? ›

Our Verdict. Our top pick for the best 2-stroke oil is the Lucas Oil Semi-Synthetic 2-Cycle Oil. It comes in a wide range of different sizes and works well in a number of different 2-stroke engines. If you're looking for our best value pick, check out the Pennzoil Marine XLF 2-Cycle Oil.

Should I use synthetic 2-stroke oil in my outboard? ›

Synthetic 2-stroke oil is a great choice for any 2-stroke motor you rely on, for work or play. Racing engines, marine engines, snowmobile engines, lawn mower motors, and other light equipment including hand-held equipment.

Is synthetic two-stroke oil better? ›

Simply put, 2-stroke engines are designed to burn oil, while synthetic oils do not readily burn. Our years of research show that regular use of synthetic lubricants leaves a glaze of unburned synthetic oil on a 2-stroke engine's cylinders.

Does it matter what 2-stroke oil I use? ›

Two-cycle oils are chemically altered to combust or burn. They're very different than 4-cycle lubricants and cannot be used interchangeably. Also, keep in mind is that not all 2-cycle lubricants are created equally. Different oils meet different quality ratings and you need to use the right rating for your equipment.

What is the best oil to run in a Mercury outboard? ›

10W-30 Mineral 4-Stroke Marine Engine Oil provides outstanding lubricity for internal engine components to reduce wear, scuffing and scoring for improved long-term reliability, making it a good choice for Mercury and other brand four-stroke outboard engines.

What 2-stroke oil does Yamaha recommend? ›

Yamalube 2M TC-W3® is Yamaha-formulated and NMMA®-approved. It provides outstanding protection for 2-stroke, water-cooled outboards, with its special blend of additives that help combat ring stick, corrosion, varnish and wear. It's a standard by which other 2-stroke oils are judged.

Can you mix synthetic 2-stroke oil with non synthetic? ›

So, can you mix synthetic oil with regular oil? Yes. If it's something you do only occasionally, mixing shouldn't damage your engine.

What's the difference between full synthetic and semi synthetic 2-stroke oil? ›

For a full synthetic motor oil 100% of the base oil composition contains these stronger synthesized base oil components. For semi-synthetic or part synthetic motor oils (these terms are largely used interchangeably) the base oil composition is a combination of synthetic and conventional base oils.

Is there a difference between 2-cycle oil and 2-stroke oil? ›

Two-stroke oil (also referred to as two-cycle oil, 2-cycle oil, 2T oil, or 2-stroke oil) is a special type of motor oil intended for use in crankcase compression two-stroke engines, typical of small gasoline-powered engines.

What are the disadvantages of synthetic blend oil? ›

A few disadvantages of synthetic oil to be aware of include: Probably the most glaring downside of synthetic oil is the cost. The price of synthetic oil is around two to four times the price of conventional oil. Synthetics may be more prone to additives precipitation during cold storage conditions.

What is the best 2-stroke oil mixture? ›

Use a 40:1 two-cycle oil mix ratio. One gallon of gasoline combined with 3.2 oz of two-cycle engine oil.

Which synthetic oil is the best? ›

List of the Best Synthetic Motor Oils
  • Mobil 1 Extended Performance Synthetic Motor Oil. This is our top pick for numerous reasons. ...
  • Royal Purple High-Performance Synthetic Motor Oil. ...
  • Shell ROTELLA Full Synthetic Diesel Engine Oil. ...
  • Pennzoil Ultra Platinum Full Synthetic Motor Oil. ...
  • Valvoline MaxLife High Mileage Motor Oil.

Is it better to put too much or too little oil in a 2-stroke? ›

Excess oil can produce a smoky exhaust, oil leaking out of the muffler, and sometimes loss of power. While not ideal, these issues can be fixed by simply replacing the fuel in the tank with properly mixed fuel. But running a two-cycle engine with too little oil can actually destroy the unit.

Does 2 cycle oil go bad over time? ›

Two-stroke oil is for small, crankcase compression two-stroke engines. Commonly, it gets mixed with gasoline before being poured into the engine. Two stroke oil has a long shelf life, but it is not infinite.

Can you put too much 2-stroke oil? ›

What happens if the mixing ratios in a 2 stroke engine are incorrect? If you put too much oil, it can generate additional carbon build-up, making it difficult to start the engine, blow excessive smoke which is particularly bad for the environment and may (with time) cause the engine to stop operating correctly.

What 2-stroke oil should I use in my Mercury outboard? ›

Mercury Premium Plus Synthetic Blend 2-Cycle Outboard Oil is specifically formulated with a higher concentration marine additive package to meet the needs of High-horsepower outboard including direct fuel-injected engines in extreme marine operating conditions.

What 2-stroke oil to use for Mercury outboard? ›

MERCURY Genuine Premium Plus 2-Stroke Synthetic Blend Oil Gal - 858027K01.

Should I use synthetic oil in my Mercury outboard? ›

For Maximum Performance and Protection, Consider Full-Synthetic Oil for Your Four-Stroke Engine. Thanks to the evolution of four-stroke engine technology within the marine space, maintaining many of today's most popular outboard, sterndrive and inboard engines is easier than ever.

Is Yamalube 2-stroke oil synthetic? ›

This technologically advanced semi-synthetic base stock and additive 2-stroke engine oil provides all-season performance and greatly reduces visible smoke. Low deposits and reduced carbon and varnish deposit means longer engine life and greater performance over time.

Who makes Yamaha outboard oil? ›

Who makes Yamalube? / Who manufactures Yamalube oil? Yamalube is a brand of marine oils and lubricants that is manufactured by Yamaha Motor Corporation.

Why can't you go back to regular oil after synthetic? ›

Once you go to synthetic oil, there is no turning back. By nature, synthetic oil is far slick than regular oil, which means that it can result in leaks in a conventional engine (which are dangerous and expensive).

What happens if you use full synthetic oil instead of synthetic blend? ›

It can lead to long term damage to your vehicle that will be very expensive to fix. Next would be if your car starts to leak oil. If you use full synthetic oil on an old vehicle, it may lead to leaks. While it most likely will not damage your vehicle, you will have to get gas more often than regular.

Can you go back from synthetic oil to regular? ›

Synthetic oils typically provide better protection than conventional oils, but switching back and forth between full synthetic and conventional oil will not damage the engine.

Which is better fully synthetic or semi synthetic engine oil? ›

Better overall performance: Fully synthetic oil is designed for the purpose of reducing friction and wear on your engine. Improved fuel efficiency: Fully synthetic oil is thinner than semi-synthetic oil, which means it takes less energy to pump it through your engine.

Is synthetic blend oil better than full synthetic oil? ›

Full synthetic oil offers longer oil change intervals and prevents sludge formation in your engine. However, synthetic blend oil is more affordable, can withstand extreme temperatures, and works well for heavy-duty use. Therefore, it's often recommended if you're driving a Hyundai SUV or perform frequent tow jobs.

Which oil is better synthetic or synthetic blend? ›

Overall, full synthetic oils provide better engine performance and protection than conventional and synthetic blend motor oils.

Can I use any 2-stroke oil in my outboard? ›

2 Stroke oil is best for any 2-stroke motor for engines such as marine, racing, snowmobile, lawnmower motors, and other light equipment. There are different brands of synthetic two-stroke oil available in the market. Performance of the oil depends on the engine and application.

Why use synthetic 2-stroke oil? ›

The 2-stroke oil base can be castor, petroleum, semi-synthetic, or synthetic. Modern two-strokes use synthetic oil to avoid high emissions and oily formations on spark plugs. You mix the engine oil with petrol or gasoline at a volumetric fuel-to-oil ratio.

How much oil do I mix with brush cutter? ›

1:25 = 1 part oil + 25 parts petrol, or 40 ml oil per litre of petrol when using other brands of oil. Any two-stroke engine oil you use in your petrol gardening tool must have the TC classification.

What percentage of synthetic blend oil is actually synthetic? ›

Synthetic Blend Motor Oil

Synthetic Blend oil is kind of like a hybrid of conventional oil and full synthetic oil. The two oils are basically mixed together so that you'll have oil that is a little bit better than conventional oil. Most blend oils will have a synthetic oil content varying from 10% to as much as 25%.

How many months does synthetic blend oil last? ›

You shouldn't keep the same oil—whether conventional or synthetic—in your car for more than a year. In fact, some experts advise that you change your car's oil every six months, regardless of the distance driven. The more stress you have on the engine, the sooner you'll need to replace the oil.

How long should synthetic blend oil last? ›

Synthetic blends and fully synthetic varieties can last 5,000 miles and up to 10,000 miles between oil changes.

Is Lucas Oil good for 2-stroke engines? ›

Lucas 2-Cycle Racing Oil is recommended for all air and liquid cooled two- stroke engines and lower specific output air cooled engines functioning under all operating conditions. It exceeds the requirements for low smoke oils often referred to as "smokeless” oils.

Can you mix different brands of 2-stroke oil? ›

Our answer: All types of two-stroke injector oils can be mixed. There will not be any compatibility issues. All brands of synthetic, semi-synthetic and conventional 2-cycle oils are compatible.

What is the difference between 50 1 and 40 1 2-stroke mix? ›

2-Stroke Oil Mix Calculator

For a 50:1 ratio of gas to oil, use 2.6 fluid ounces of oil per gallon of gas. For a 40:1 mixture, use 3.2 fluid ounces of oil per gallon of gas.

What is the world's number one engine oil company? ›

Exxon Mobil Corporation

As the leader in this market, Exxon Mobil offers customers operating worldwide the largest portfolio of lubricants.

What is the number one engine oil in the world? ›

Though it was originally released to safely enhance fuel efficiency, later formulations of Mobil 1™ engine oil offered outstanding wear protection over the widest range of temperatures. Now, more than four decades later, Mobil 1™ remains the world's leading synthetic engine oil brand.

Is Royal Purple the best motor oil? ›

Because of the advanced, proprietary Synerlec® additive technology, Royal Purple synthetic oils containing Synerlec outperform any other lubricant, including other premium synthetic oils. Synerlec additive technology increases the oil film strength to 3 – 4 times that of any oil of comparable viscosity.

How long can 2-stroke oil sit? ›

There's no reason you can't use two cycle oil that was refined even 50 years ago, though it won't contain the same additives as newer oil. However, you shouldn't leave oil in your oil tank for more than a year without use. Under these circumstances, the oil can solidify and become quite gelatinous.

Why does my 2-stroke burn oil? ›

Each time a new charge of air/fuel is loaded into the combustion chamber, part of it leaks out through the exhaust port. That's why you see a sheen of oil around any two-stroke boat motor.

What is the shelf life of outboard motor oil? ›

The general rule of thumb when dealing with engine oils is that they tend to remain usable for around 5 years if stored properly. That last part is key. Sealed bottles kept in a safe environment will last longer and you will not need to worry about contamination.

Is 2 year old oil OK? ›

Simply put, the shelf life of conventional motor or "lube" oil is up to five years. It's not something that goes bad in a couple of months. It's impossible to predict exactly how long motor oil shelf life is because petroleum stability (how well it resists change in its properties) is situation-dependent.

How do I know if my 2-stroke gas is bad? ›

Common Symptoms of Bad Gas:
  1. The engine won't start.
  2. The primer bulb isn't working.
  3. There is a bad smell in the gas tank.
  4. The engine isn't revving up all the way.
  5. There is excessive smoke, especially white smoke from the exhaust.
Jun 16, 2014

What is the fuel mix ratio for a 2-stroke outboard? ›


During the break-in period you should use a 25:1 oil/fuel mixture (1000 mL of oil for every 25 liter of gas). See our oil/fuel chart for more info on the 50:1/25:1 ratios. Tohatsu 2-stroke outboards use TCW3 oil which is specially formulated for 2-stroke outboards.

What happens if you overfill oil by 1 2 quart? ›

Overfilling with oil can cause foaming, which turns a slippery lubricant into a sudsy fluid with air bubbles that diminish the lubricating and cooling properties.

How much oil do you put in a two-stroke to make it run good? ›

Many two-cycle models require a 40:1 gas-to-oil ratio (i.e. 3.2 fluid ounces of two-cycle oil for every one gallon of gas), but some older models may require a 50:1 or 30:1 ratio. The equipment's recommended ratio is usually listed on the engine housing.

What is the difference between outboard 2-stroke oil and normal 2-stroke oil? ›

The relevant difference between regular lubricating oil and two-stroke oil is that the latter must have a much lower ash content, to minimize deposits that tend to form if ash is present in the oil when it is burned in the engine's combustion chamber.

Is there a difference between 2-stroke oil and marine 2-stroke oil? ›

A very brief explanation is that water cooled two strokes (outboard) run much cooler than an air cooled two stroke. The different combustion temperatures require different forms of lubrication pre and post burn. Your air cooled bike likely needs a low ash mix oil made specifically for air cooled engines.

What is the best fuel for older 2-stroke outboards? ›

“We recommend 87 octane for both our two- and four-stroke motors. We stress the importance of a good, name-brand gasoline.” Additionally, Grigsby says Yamaha recommends the regular use of fuel additives, such as conditioner, stabilizer, combustion-chamber cleaner and gas-line anti-freeze.

What is the best oil for a Mercury 50 hp outboard? ›

10W30 is recommended for all marine engines. Things to know about this oil: For use in all 4-stroke marine engines. This oil is engineering approved for all marine 4-stroke applications including: outboard, MerCruiser, high performance, stern drive/inboard.

What happens if you put too much oil in a 2-stroke outboard? ›

What happens if the mixing ratios in a 2 stroke engine are incorrect? If you put too much oil, it can generate additional carbon build-up, making it difficult to start the engine, blow excessive smoke which is particularly bad for the environment and may (with time) cause the engine to stop operating correctly.

Is Quicksilver oil the same as Mercury? ›

They all work. Quicksilver oil is repackaged Mercury Oil for other retail sales outlets,a few years ago I called mecury to ask if they were the same oil and was told they couldn't or wouldn't say so. but the guy said he would use QS premium plus over the regular Merc oil.

What oil ratio for Mercury 90hp 2-stroke? ›

50:1 - Mix 100ml of oil per 5ltrs of fuel.

Recommended by Mercury, Mariner, Tohatsu, Johnson and Evinrude this is my preferred ratio for all outboards including Yamaha and Suzuki. You can confidently use this ratio for any horse power and just about all year models.


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