How to dilute oil with gasoline for a chainsaw

The right oil to gasoline ratio for a chainsaw

Hi there! This article will talk about the correct oil to gasoline ratio for a chainsaw. This is probably the most important thing to know when using this machine. Not enough oil produces unnecessary friction and too much oil results in excessive fouling and overheating. In the end, both will lead to rapid engine failure. Repairs can cost half the price of a new chain saw.

Besides the correct proportions we are going to talk about other important things, which will help to prolong the life of your chainsaw. what kind of gasoline to use, what oil to pour, the methods of dilution, storage times of the ready mix, etc so I advise you not to quit reading the article after the section on proportions, because further, there will be information that will be useful for you.

The correct proportions

So, I won’t beat around the bush for a long time, but pass straight to the figures. The most common dilutions are 1:50 and 1:40. That is, for 50 or 40 parts of gasoline one part of oil is poured. For those who don’t understand, I’ll explain in more detail. We take a liter of gasoline and divide it by 50 or 40, respectively. As a result, we get the necessary amount of oil for one liter of petrol. So, one liter is 1000 ml. 1,000 ml divided by 50, we get 20 ml of oil. Divided by 40, you get 25 ml. This is how much oil you need to add to one liter of gasoline.

But you’ll say you don’t know what the proportion should be on your chainsaw. Well, if you have lost the manual or for some reason there is no information about the proportion in it, you can use the following rules:

  • if the chainsaw and oil are of the same brand (for example, STIHL chainsaw and STIHL oil), dilute petrol and oil in the ratio indicated on the oil (usually 1:50);
  • if the chainsaw and oil are of different brands, then follow the 1:40 ratio;
  • if the brand is the same, but there is no information on the oil, then dilute in the ratio 1:40;
  • if you don’t know anything at all. you don’t know the brand of chain saw or the oil., still dilute in the 1:40 ratio. The important thing is to know that the oil is exactly right for two-stroke chainsaw engines.

If the saw is new and is running-in, it is recommended to increase the amount of oil for the first three fills of the fuel tank by about 20%. That is, the ratio of 1:50 turns into 1:42, and 1:40 into 1:33. Or 24 or 30 ml of oil per 1 liter of gasoline respectively. Except for increasing oil quantity in fuel mixture there is no other running-in actions with the chainsaw, unless otherwise specified in the instruction. That means you should not, for example, allow it to idle for too long or cut not at full speed, because overheating will result in premature failure. Always cut at maximum rpm. After you’ve used three tanks of fuel (you mean a tank of chain saw), go to a regular 1:50 or 1:40.

But sometimes it happens that a manufacturer specifies another proportion than the ones I gave above. For example 1:25 or 1:32. In that case it is necessary to follow these proportions. Although if you know about them, what are you forgetting in this article?

How to mix oil with gasoline for a two-stroke engine

The peculiarity of two-stroke engines is that the fuel is filled into the tank together with oil. Every refueling requires the fuel mixture to be prepared in proportions before operating the equipment. How to do it right? From our article you will learn how to dilute gasoline for chainsaws, grass trimmers and other garden tools.

It is recommended to buy unleaded gasoline to operate garden equipment. Otherwise there is a risk of engine failure. Manufacturers advise fuel with an octane number not lower than AI-90, better AI-92 or AI-95. Individual recommendations for your tool, see instructions. At the filling station, pour the required amount of fuel into the canister. It is advisable to use a metal container: in such a container does not create static electricity from friction, which increases the safety of use.

Buy branded oils for two-stroke engines, preferably API-TB or API-TC. The manufacturer should indicate the recommended brands in the instruction manual for the tool. Also consider their composition. Mineral oils are suitable for use in warm weather. Synthetic is better, they are less viscous and can be used even in freezing temperatures. Semi-synthetics are mineral oils with improved qualities, versatile for any season. Check label for temperature rating. Also pay attention to the volume. It is not the proportion of gasoline and chain saw oil that is important, but the amount of fuel mixture you will need for one filling and how often you will work with the tool. If you have a grass trimmer or chain saw in your arsenal and use one or the other tool several times a week, it makes sense to buy a large 3 to 5 liter canister of oil. For several mowing during the gardening season it is enough to take a bottle of 1 liter.

dilute, gasoline, chainsaw

Mixing oil with gasoline

When starting work with the tool there is always a question of how much oil to add to gasoline for a chainsaw or grass trimmer. It is important to remember that for two-stroke engines the ratio is 1:50, t.е. 5 liters of fuel and 100 ml of oil. Why it is important to follow the proportions? Excessive oil causes carbon deposits on pistons and spark plugs, and lack of oil reduces the lubricating power of the fuel mixture, which leads to burrs in the piston group and increases the risk of engine damage.

The easiest way to follow the gasoline and oil proportions for a chainsaw is to use measuring containers. They have a scale with marks on them, which is easy to navigate. Before filling up with petrol and oil, make sure the container is clean. The engine oil level should not be too high. water and dirt should not get inside. this would affect the quality of the fuel mixture. First pour petrol to the right line, then add oil to the right line. To mix them, tilt the container several times. The fluids will mix quickly and the mixture will take on a uniform color, such as green or red (depending on the oil composition).

Important to Know! Never use plastic drink bottles for storing and mixing fuel mixture. Gasoline corrodes plastic. And even if the walls of the bottle seem to be intact, harmful components will get into the fuel mixture, and with it into the engine. It is very bad for the carburetor.

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Wearing gloves is recommended to protect your hands from the gasoline and oil. Also do not forget about the elementary rules of fire safety. Always mix outdoors so gasoline fumes do not build up indoors. Do not smoke while working and exclude other factors that can cause ignition of fuel and lubricants.

Pour the prepared fuel mixture into the fuel tank and close the cap tightly. If you have blended more than you can use at one time, empty it into a separate canister for storage or leave it in the blending tank. The main thing is to keep the cap tightly closed. The ready mixture can be stored for two weeks and used for refueling without risk to the engine. The only condition is that it must not be left in the fuel tank. If you won’t be using the tool for a long time, use up all the leftovers or drain it.

Now you know how to dilute gasoline for a chainsaw so as not to damage the engine. Try to do it yourself. After you have dosed the fuel mixture several times, you will know how many components are needed, so there is no excessive mixture. You can buy everything you need in our online store. With brand name oils, your tool will last a long time.

Consequences of wrong dosage

Many chainsaw users don’t pay enough attention to the proportion. 50 grams more or less. it doesn’t matter? And in vain: often the cause of saw malfunctions is operation with an improperly prepared fuel mixture. It is possible to make a mistake or intentionally breach the ratio either to the higher or to the lower side.

If you have a lot of oil.

There is an opinion among chainsaw owners that “you can’t ruin an engine with oil”. But they don’t make up the right parameters for a ready-to-use fuel mixture for nothing. Too much oil can also be harmful and inconvenient. In fact, in spite of improved combustibility without residues, part of hydrocarbons still turns into soot and sludge. If you don’t use much oil, but if you double the concentration, you get cinder blockage. It is especially dangerous for cheap mineral oils that don’t have a “flushing” effect.

It is also very likely that you will find oil in the air filter if you overfill the carburetor. The spark plugs will also be in soot. it will need to be cleaned, flushed and dried. Also, the vapors of unburned oil will settle in the muffler, and during intensive operation will burn out, forming a plume of soot and sparks.

After such refueling almost all insides of the saw have to be thoroughly cleaned and rinsed. The most cheerful “surprise” will be “dying” of piston rings, but that is in case of systematic abuse of oil overflow and operation under high load.

or not enough

“Greedy” cooking of the fuel mixture has killed more than one piston. That’s where “too much” is better than “not enough”. If in the first case you will have to have a thorough “washing” of the engine, in the second case you will have to change the cylinder block, and it is not profitable at all for many saws and costs quite a lot of money for others.

Conclusion: Saving money is pointless. If there is not enough oil, the piston starts rubbing hard against the cylinder because gasoline is too fluid at high temperatures to perform its lubricating function.

Unfortunate result: scoring on the piston, ruined saw engine. If the owner gets his bearings in time he will find that the piston and cylinder turn a beautiful blue. No master can guarantee how long these will last.

Recommendations for ingredients

Even a chainsaw owner who observes the proportion to the gram can harm his tool if he uses low-quality or inappropriate components. The general recommendation is to use special fluids.

Two words about oil.

Oil for two-stroke engines is mainly produced for gasoline-powered household tools. It is always painted in some bright color. blue, green, red, pink. This is done so that when added to gasoline, it becomes clear that it is a ready mix, which can already be poured into the gas tank. Large manufacturers, such as STIHL, have several types of oil which are differentiated by color.

If you have a chainsaw for which this oil is recommended, it’s a good idea if you are a beginner. Experienced chain saw operators try and fail to find the oil that suits them best.

Don’t use car engine oil in a two-stroke engine! Although the Internet is full of reviews of those who say, “I’m pouring, and the flight is normal,” believe me: they have not yet shown the master of the piston of his tool. And you won’t be happy with smoke coming out of the muffler.

and about gasoline

To say that in oil-producing and refining Russia gasoline is mostly of bad quality. is to repeat the obvious. “Get” the bad fuel is possible not only at anonymous gas stations, but also at large gas stations with a big name. High-quality gasoline is very important for modern high-tech chainsaws. it allows them to work with maximum efficiency and minimum wear. A common requirement today is the use of gasoline with an octane rating of at least 92. It has optimal values for chainsaws.

You could pour 76 gasoline in old Soviet cars. Today it is not worth doing it even with cheap Chinese saws. you will only speed up their “death”. It’s also not recommended to go to the other extreme: to pour 95 or even 98 into an expensive tool thinking that it will make it better.

We recommend that you fill two-stroke engines with 92 gasoline which you can buy in reliable shops and which you are sure is of good quality.

Customers come in and ask: the better the gasoline, the better the saw? Why not use 95 then?? Because the more advanced cars only needed it.

Answer: most of the Russian gasoline 95 is the same as 92, but with detonation reducing additives. This parameter is not important for a chainsaw, it needs the purest possible gasoline, because gasoline additives are superfluous. So the logic is simple: better a pure 92 than a more expensive 95, but with unnecessary additives.

Chainsaw oil

Mainly for the widespread in our country chain saws are used oil grade API-TB. less often API-TC may be used, but only if the manufacturer has specified it on the package. It should also specify how much oil should be added to gasoline. For saws with lower loads the API-TC class is used.

The above oil grades are classified by the American Petroleum Institute. There is also another well-known Japanese company, which also defines the power classes of lubricants. In such cases it is recommended to use JASO-FB and JASO FD oils in petrol.

It is important to note that using oils that are used in four-stroke engines on two-stroke engines is categorically impossible.

This is due to the fact that in the second case, it is important that the lubricant burns completely. This is achieved by using synthetic oil, which emits less smoke and produces less combustion residue. Before diluting the fluid, you should always pay attention to the instruction manual for the chainsaw, which should specify the types and brands of all consumables that should be used on the device.

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How to fill a chainsaw? See under

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What kind of gasoline to put in a chainsaw?

According to experts, you should use unleaded gasoline obtained by adding lead-free additives with an octane number greater than 90. Foreign models require higher grades of gasoline and use branded oils from the tool manufacturers. The ideal fuel is AI-92. How to fuel a STIHL 180 chain saw? In this case, they mean oils in a mixture of 1:40. It is quite suitable for it and fuel AI-95, but according to professionals it is better for chainsaws do not apply.

The fact is that it is made on the basis of AI-92 with the use of certain additives that change the quality of the fuel. These components deposit on the inner parts of the tool and when they reach a critical mass, they begin to flake off, disrupting the mechanism. The best option is to follow the instructions that come with the selected model. It is recommended to use fresh gasoline, because the octane properties are lost during prolonged storage in containers.

dilute, gasoline, chainsaw

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The ratio of oil and gasoline for a chainsaw

About how much engine oil to dilute for 1 liter of gasoline, tells the firm instruction on the operation of the garden tool. In American, Japanese and Swedish models, the proportion of oil and gasoline for a chainsaw should be 1:40 or 1:50. That means that in 1 liter of pure gasoline you need 25 ml and 20 ml of engine oil, respectively. In these cases the gasoline mix will be as balanced as possible and suitable for powerful engines, which are used in most chain saws of well-known brands.

A slightly different way to dilute gasoline for a chainsaw made in China. In the manuals to these models, their manufacturers indicate that the proportion of the components of the fuel mixture for their filling should be 1 part of gasoline to 25 parts of motor oil. It means that in 1 liter of fuel you need to dilute 40 ml of oil. This difference between Chinese power tools and machinery made in other countries is due to the fact that the distance between the cylinders and pistons of Chinese-made garden tools is greater than that of more expensive brand-name models. Accordingly, they need twice as much oil to mix with gasoline.

What chain oil to use for a chainsaw chain??

For information on what chain oil for a chainsaw is best, you can find in the instruction manual of the model. However, not all owners of garden tools retain their chainsaw instruction manual. In such cases, when choosing an oil, you should study its characteristics and its main lubrication requirements.

The first thing to pay attention to is the adhesion property of the chain lubricant. During daily use of the chainsaw at medium and maximum allowable rpm, the chain moves along the bar at a fairly high speed. In this way, oil that is not highly adhesive will fly off the chain by inertia. As a result, only the upper part of the chain will be lubricated, while the lower part will work under the influence of increased friction.

Chain oil for chainsaw chain lubrication must meet a number of other requirements.

  • protection of the chain against corrosion. the lubricant should repel moisture, which provokes the appearance of rust on the teeth and links of the headset;
  • Wear-resistant. intensive use of your garden tool puts extra stress on the chain parts, which can cause premature wear. The use of a quality lubricant can help prevent this;
  • no fouling. the oil selected to lubricate the chain should not accumulate and dry out on the chain elements. Over time, this leads to lumps that make it difficult for the chain to rotate on the bar;
  • ability to work over a wide temperature range. a quality chain lubricant should not freeze at the first frost and not boil under high temperatures. The optimum range is from.15 to 40 ⁰C.

ForestPlus, SynthPlus and BioPlus are the most popular chainsaw lubricants used by chainsaw operators. These oils are highly stable, able to work in the most difficult weather conditions, and protected against corrosion.

Preparing the fuel mixture: the proportion of oil and gasoline for the chainsaw

The chainsaw engine is the heart of the machine and it is very important to use correct fuel mixture.

The fuel mixture for a chainsaw is prepared of two components. oil and gasoline. Chainsaws are equipped with two-stroke engines, so oil is not added to the lubrication system (as in a four-stroke engine), but directly to the gasoline. It is very important to observe correct proportions of ingredients and of course not to try to work with pure gasoline, because that will “kill” the chainsaw very quickly.

The oil must be suitable for the two-stroke engines of forestry equipment (i.e. you may under no circumstances use oil for outboard motors or scooters). As practice shows, such oil can be bought in any store or service center, where chainsaws are sold or serviced.

If we talk about what gasoline to fill a chainsaw, it would be optimal to use fuel with the octane number of A-95, in this case, the savings on fuel can turn out badly. European manufacturers often indicate that you can use gasoline A-90 or A-92, but in post-Soviet countries, the quality of gasoline is inferior to European, so in our reality it is better to use higher-quality gasoline.

As for the petrol-oil mixture ratio itself, everything is simple: you must clearly follow the instructions of the tool. All chainsaw manufacturers indicate the necessary ratio in the instruction manual or in the tool’s certificate, besides, the proportions for filling the chainsaw may differ depending on the model of the chainsaw. as a rule, the oil to petrol ratio in a chain saw from reputable manufacturers is 1:40 or 1:50, which means 1 part oil to 40 parts of petrol, for example.

Now for the arithmetic: 1 liter of gasoline = 1000 ml of gasoline, divide by 40 and you have 25 ml of oil. If you do the same for a 1:50 ratio, you get 20 ml of oil for 1 liter of gasoline.

As for the budget chainsaws made in China, the situation is slightly different. The ratio of gasoline to oil for a chainsaw made in China 1:25, so 1000 ml of petrol divided by 25, you get 40 ml of oil. The reason is that brand name chainsaws have a solid build and the distance between pistons and cylinders in the engine is much less than in the Chinese ones, that’s why the required oil volume differs by almost a factor of two.

To measure a correct portion of oil, use an ordinary medical syringe of sufficient volume.

One more subtlety. in a dry gasoline canister, pour the gasoline first, then the oil. The procedure on the contrary is fraught with a fuel mixture of poor quality, because the oil is denser, will stick to the bottom of the canister. So good blending is out of the question.

Always prepare the fuel mix in a fuel can and fill the fuel tank with pre-mixed fuel! Never mix and mix it directly in the gasoline tank of your chainsaw!

If the question of how to dilute gasoline for a chainsaw is solved, then and about fuel mixture storage conditions and shelf life it is worth saying a few words. It is best and easiest to prepare gasoline-oil mixture for 1 liter of gasoline, it is recommended to do it just before working with the tool. Gasoline fuel tanks have a capacity of 0.3 to 1 liter. In conditions of domestic use, the entire volume of the prepared combustible mixture is rarely used in one session, so the remainder can be saved until the next work session. Store fuel mixture in a special gasoline canister, in a dark, dry place. It is optimal to calculate that the shelf life of the ready mix is 7-10 days

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The fact that currently presented on the market oil is not synthetic, but organic, i.e. natural. After 10 days all lubricating properties are lost, gasoline simply “eats” the oil. Naturally, to use such fuel is no longer allowed, it can cause breakdown and failure of the chainsaw.

At the end of the work it is necessary to drain the fuel mixture and start the chainsaw. the tool will stall (so that the saw has a dry carburetor) and now you can leave it until the next session of operation.

Preparing the fuel mixture: the proportion of oil and gasoline for the chainsaw

The chainsaw engine is the heart of the machine and it is therefore very important to use a proper fuel mix.

The fuel mixture for a chainsaw is made of two components. oil and gasoline. Chainsaws are equipped with two-stroke engines, so oil is not added to the lubrication system (as with a four-stroke engine), but directly to the gasoline. It is very important to observe the correct proportions of ingredients and, of course, in no case try to work with pure gasoline, because that way you will very quickly “kill” the chainsaw.

dilute, gasoline, chainsaw

The oil must be necessarily designed for two-stroke engines of gardening and forestry machinery (that is, in no case can you use oil for boat motors or scooters). As practice shows, you can buy such oil in any store or service center, where chainsaws are sold or serviced.

If we talk about what gasoline to fill a chainsaw, it would be optimal to use fuel with the octane number of A-95, in this case, the savings on fuel can turn out badly. Often, European manufacturers indicate that you can use gasoline A-90 or A-92, but in post-Soviet countries, the quality of gasoline is inferior to European, so in our reality it is better to use a high-quality gasoline.

As for the proportion of petrol-oil mixture, then everything is simple: you need to follow the instructions of the tool. All chainsaw manufacturers indicate the required ratio in the instruction manual or in the tool’s certificate, moreover, the proportions for filling the chainsaw may differ depending on the model of chain saw. as a rule, the oil to petrol ratio in a chainsaw of famous manufacturers is 1:40 or 1:50, which means 1 part of oil to, for example, 40 parts of petrol.

Now the arithmetic. 1 liter of gasoline = 1000 ml of gasoline, divide by 40 and you get 25 ml of oil. If you do the same for a 1:50 ratio, you get 20 ml of oil per 1 liter of gasoline.

As for the budget chainsaws made in China, the situation is a little different. gasoline to oil ratio for chain saw made in China 1:25, so we divide 1000 ml of gasoline by 25, so we get 40 ml of oil. The reason is that brand name chainsaws have a solid build and the distance between the pistons and cylinders in the engine is much less than in Chinese chainsaws, that’s why the required oil amount is twice as much different.

for the right amount of oil, use a regular medical syringe of sufficient volume.

One more tricky part. fill the dry gasoline canister with gasoline first, and then with oil. The procedure on the contrary is fraught with low quality fuel mixture, because the oil is denser, will stick to the bottom of the canister. That is why a good mixture can not go.

Always prepare the fuel mix in the canister and fill the fuel tank with ready-to-use special fuel! Never mix or mix special fuel directly in the fuel tank!

If the question of how to dilute gasoline for a chainsaw is solved, then and on the storage conditions and expiration date of the fuel mixture it is worth saying a few words. It is best and easiest to prepare gasoline-oil mixture for 1 liter of gasoline, it is recommended to do it just before working with the tool. Gasoline tanks in chainsaws have a capacity of 0.3 to 1 liter. In home use, the entire volume of the fuel mixture is seldom used in a single session, so the remainder can be saved until the next session. The fuel mixture should be stored in a special gasoline canister, in a dry, dark place. It is optimal to calculate that storage time of the mixture will be 7-10 days

The fact that the oil on the market now is not synthetic, and organic, that is natural. After 10 days all lubricating properties are lost, gasoline simply “eats” the oil. Of course it’s not allowed to use such fuel, it can cause malfunction and damage to the chainsaw.

At the end of work it is necessary to drain the fuel mixture and start the chainsaw. the tool will stall (so that the saw has a dry carburetor) and now you can leave it until the next session of operation.

Recommendations for storage

It is better to prepare the mixture in an amount that should be enough for one-time work. The problem is the irreversible deterioration of the working properties of the mixture during storage. It is recommended to use the ready-to-use mixture for the next few days.

A mixture of petrol and oil with a month’s worth of oil impairs the traction capability of the engine. There is also a formation of tar compounds in the fuel system and intensive fouling in the combustion chamber, loss of mobility of piston rings.

  • With minimal damage to quality, it is advisable to store gasoline with oil for no more than 2 weeks. At ambient temperatures of 25 degrees or more this period is reduced to 8-10 days.
  • In order to save money, the expired mixture may be gradually expended, adding it to a fresh composition in the amount not exceeding 10% of the total volume.

In order to avoid problems associated with failure of the fuel system, it is recommended to filter the prepared mixture through a non-fiber material such as chamois, or a fine-meshed twill weave, metal mesh.

Peculiarities of running-in of a new tool

This includes sparing the chainsaw’s initial operating period. The technology also involves running the engine on a mixture with 20% more engine oil.

The running-in time in moto-hours is indicated in the included manual. In practice, to get the tool to a working level, it is enough to work out 3-5 refills of the gas tank of the saw.

New models do not need a running-in period, but it is not advisable to run the chainsaw under heavy loads for the first few hours.