# How much oil to add to gasoline for a chainsaw

## The right oil to gasoline ratio for the chainsaw

Hello, everybody! This article will talk about the correct oil to gasoline ratio for a chainsaw. This is probably the most important thing you should know when operating this machine. Lack of oil will lead to excessive friction, and too much oil will lead to excessive fouling and overheating. In the end, both will lead to rapid engine failure. Repair can cost half the price of a new chain saw.

Except for a correct mixing ratio, here we are going to discuss some other important things to make your chainsaw run for a long time, e.g. what kind of gasoline to use, what kind of oil to pour, methods of dilution, time of storage of the ready mix, etc so I advise you not to stop reading the article after the section on proportions, because further on there will also be information that will be useful for you.

## The right proportions

So, I won’t beat around the bush for a long time, but go straight to the numbers. The most common dilution proportions are 1:50 and 1:40. That means one part of oil for every 50 or 40 parts of gasoline. For those who do not understand, here is an even more detailed explanation. We take one liter of petrol and divide it by 50 or 40 accordingly. 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, you get 20 ml of oil. Divided by 40, you get 25 ml. This is exactly how much oil you need to add to 1 liter of gasoline.

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

• if your chainsaw and oil are of the same brand (e.g. STIHL chainsaw and STIHL oil), use the mixing ratio indicated on the oil (usually 1:50);
• If you use different brands of chain saw and oil, you should use the ratio 1:40;
• If the brand is the same, but there is no information on the oil, then dilute in the 1:40 proportion;
• If you don’t know anything at all, you don’t know the brand and type of chainsaw or the oil., still dilute in 1:40 proportion. The main thing is to know that this oil is exactly right for two-stroke chainsaw engines.

If your chain 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 means that 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. I want to note that besides increasing amount of oil in fuel mixture you shouldn’t make any other running-in measures with your chainsaw, unless otherwise specified in the manual. That is, you should not, for example, leave it idling for a long time or cut not at full speed, as this will lead to its overheating and a quicker failure. Always saw only at maximum rpm. And after working out three tanks of fuel (meaning gasoline saw tank) go to the usual proportions of 1:50 or 1:40.

But sometimes it happens that the manufacturer specifies a different proportion compared to the ones I gave above. For example 1:25 or 1:32. In that case, you have to follow these ratios. Although if you know about them, what have you forgotten in this article?

## Petrol to oil ratio for chain saws

Proportions of oil and gasoline for two-stroke chain saw engines of different brands are 40 to 1 or 50 to 1. This ratio is standard and is not only used by beginners, but also by experienced sawyers. This ratio is close to the ideal one for preparing the fuel mix, and provides lubrication of the crank and piston parts.

How much oil to put in your gasoline in milliliters? The ratio of oil and gasoline 1 to 50 per ml is 20 ml to 1 liter. To prepare the correct mixture, you should fill a plastic bottle with 1 liter of gasoline, and dilute it with 20 ml of oil. In order to measure how much oil to pour, you should take a special measuring cup, and fill it to the appropriate mark. If you plan to prepare 2 liters of fuel at once, you must add 40 ml of lubricant to this amount of gasoline.

There are also other ratios, which are offered by different manufacturers. These ratios differ slightly, but if you have read in the passport to the tool other values, then it is required to adhere to them. Ratios of 1:50 or 40 are standardized. You should pour 15 ml of oil per 1 liter of fuel in summertime, and not less than 20-25 ml in winter. Knowing the recipe for the mixture, you should also understand the question of what gasoline to fill a chain saw?

## Gasoline and chain saw oil. which is better?

Often beginners ask what is better to take gasoline for your tool? In order not to make a wrong choice, it is recommended to read the instruction manual of the tool. In the manual, each manufacturer specifies the appropriate brand of fuel. If the manufacturer specifies that the octane number should not be lower than 95, it means that pouring 92 gasoline is not recommended.

Now let’s see, what kind of oil is better for chainsaw engines. Special oils are used for such purposes. It is forbidden to take motor oil from car engines to prepare a fuel mixture. For chain saws you need to buy a lubricant for two-stroke motors, which are on sale not only in specialized centers, but also in online stores.

Engine oils for two-stroke engines are produced by such manufacturers:

Usually the ratio is indicated on the bottle with the lubricant, so it will be difficult even for beginners to get confused with the preparation of the fuel mixture. Under no pretext do not use used oil even as a chain lubricant. This will lead to the fact that soon you will need to repair the tool.

## How to mix oil and gasoline for a two-stroke engine

The peculiarity of work of two-stroke engines is that the fuel is filled into the tank together with oil. Each filling process requires the fuel mix to be prepared in proportions before operating the machine. How to do it right? From our article you will learn how to dilute gasoline for a chainsaw, grass trimmer 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 АI-90, preferably АI-92 or АI-95. See owner’s manual for specific recommendations for your tool. Fill the canister with the correct amount of fuel at the gas station. It is desirable to take a metal one: in such a container there is no static electricity from friction, which increases the safety of use.

Buy brand name two-stroke engine oils, preferably API-TB or API-TC. The manufacturer should indicate the recommended brands in the instruction manual of the tool. Also consider their composition. Mineral oils are suitable for use in warm weather. Synthetic oils are 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 the temperature rating on the package for the operating temperature limit. Also pay attention to the volume. It is not the proportion of gasoline and chain saw oil that is important, but how much 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 addition to your arsenal, and you 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 operations in a cottage season, a 1 liter bottle is enough.

Mixing oil with petrol

When you start working with the tool you always wonder how much oil to add to petrol for your chain saw or grass trimmer. The important thing to remember is that for two-stroke engines the ratio is 1:50.е. You need 100 ml of oil for every 5 liters of fuel. Why it is important to respect the proportions? The hardest way to keep your chainsaw in proper oil proportions is to dilute the oil’s lubricating power, which creates scuffing in the piston and spark plug assembly, and increases the risk of engine damage.

It’s easy to follow the gasoline and oil proportions for chainsaws with measuring jugs. They are marked with a scale and easy to read. Before pouring gasoline and oil in, make sure the container is clean. Avoid getting water and dirt in the engine as this may affect the quality of the fuel mixture. First fill petrol to the proper level, then add oil. also to the proper level. To mix it up, tilt the can several times. The liquids will quickly mix and the composition will take on a uniform color, such as green or red (depending on the composition of the oil).

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

It is recommended that you wear gloves to protect your hands from the gasoline and oil. Also remember basic fire safety precautions. Mix liquids outdoors so gasoline fumes do not accumulate indoors. Do not smoke while working and avoid other factors that can cause ignition of flammable liquids.

Pour the fuel mixture into the tank and close the cap tightly. If you have made more mix than you can use at one time, empty it into a separate storage canister or leave it in the mixing tank. The main thing is to close the cap tightly. The ready-to-use mixture can be stored for two weeks and can be used for refueling without any risk for the engine. The only condition. do not leave it in the fuel tank. If you are not going to use the tool for a long time use up the leftovers completely or drain them.

Now you know how to thin your chainsaw oil so you don’t damage your engine. Try to do it yourself. After you have made the fuel mixture a few times you will know how many components are needed, so you won’t have any extra mixture. You can buy everything you need in our online store. With brand name oils your tool will last a long time.

## Chainsaw oil

API-TB oil is mainly used for chainsaws that are common in our country. API-TC may be used somewhat less frequently, but only when the manufacturer has specified it on the package. There should also be an indication of how much oil should be added to petrol. For saws with lower loads the API-TC class is used.

Oil grades above refer to the American Petroleum Institute classification. There is also another well-known Japanese company, which also defines power classes of lubricants. For chain saws 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 is completely burned. This can be achieved by using synthetic oil, which emits less smoke and produces less combustion residue. Before you dilute the liquid, you should always pay attention to the instructions to the chainsaw, which should specify the types and brands of all consumables that should be used on the device.

How to fill a chain saw? See in

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## What gasoline to fill a chain saw?

According to experts, you should use unleaded gasoline, obtained by adding lead-free additives, whose octane number exceeds 90. Foreign models require a higher grade of gasoline and original oils from the tool manufacturer. The perfect fuel is considered to be AI-92. How to fuel a STIHL 180 chain saw? In this case oils in 1:40 mixture are implied. It is quite suitable for it and fuel AI-95, but according to professionals it is better not to use for chainsaws.

The fact 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 operation of the mechanism. the best option is to follow the instructions that come with the chosen model. It is recommended to use fresh gasoline, because long storage in tanks loses octane properties.

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## What gasoline to fill a chain saw?

According to experts, you should use unleaded gasoline, obtained by adding lead-free additives, the octane number of which exceeds 90. For foreign models it is required to pour petrol of higher grades and use branded oils of the tool manufacturers. AI-92 is considered the perfect fuel. How to fuel a STIHL 180 chain saw?? In this case, oils in a 1:40 mixture are implied. Gasoline AI-95 will do for it, but according to professionals it is better not to use it for chainsaws.

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

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## Oil to gasoline ratio for the fuel mixture

The ratio of oil and gasoline for a chainsaw is usually made according to two recipes:

If the chainsaw is recently purchased and has not yet been operated, the proportion of lubricant is increased by a quarter. the same amount is poured into fuel when sawing at temperatures below 2 degrees.

It is not very difficult to obtain such a mixture. Almost every modern chain saw is equipped with a special twin-part reservoir. The smaller part of it is filled with oil and the larger part with gasoline. The lids of both parts are screwed on tightly and the container is inverted and shaken thoroughly. This ensures that both components are completely and homogeneously blended.

If there is no such special container, you can use any gasoline-resistant plastic container with a one-liter lid and a disposable syringe for 5-10 cc. The gasoline container should be cleaned of any contaminants and water before use. After that one liter of 92-95 gasoline is poured into it.

20 ml of oil are poured into the syringe at the same time. If it is refueled in cold weather, it must be taken 24-30 ml. Carefully pour it into a container with gasoline. It is tightly closed with a lid and shaken thoroughly until the components are thoroughly mixed.

All operations on preparation of the fuel mixture should be carried out in the open air outside the living space. In addition, it is important to strictly observe fire safety measures!

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### Risks of using fuel and oil surrogates

To avoid early failure of the chainsaw, it is recommended that the tool be refueled exclusively with quality and branded consumables. To find such materials is not difficult, because they are usually sold in branded outlets. Use of low-quality gasoline can cause engine failure, so it is recommended to buy fuel at gas stations where high quality fuel is guaranteed.

It is categorically forbidden to mix gasoline with motor oil for cars, because it is not intended for such purposes at all. Compliance with the proportions, as well as the use of quality materials will prolong the service life of your tool for many years.

## What chain oil to use for a chainsaw chain?

To know exactly what chain oil to use, you need to study the chain saw manufacturer’s instructions. Almost all tool manufacturing companies recommend pouring a product that stands out with the highest adhesive properties. This means that the material used to lubricate the chain must have adhesion to the metal surfaces of the chain and bar.

You need to understand why a lubricant has adhesive properties. The saw chain travels at high speed while the chain is on the bar. If you use chain oil for chainsaws with low adhesion for lubrication purposes, more than half of the fluid will inertia fly off the top of the bar before it reaches the bottom. As a result, such oil will prove ineffective and the bar and the chain will fail quite quickly because of the constant friction.

There are some high-quality oils on the market that are recommended by nearly all chainsaw manufacturers and the saw companies. These products have high adhesive properties, which makes them effective in harsh weather conditions. These lubricants include:

• STIHL ForestPlus oil. best used in temperatures above freezing.15 ⁰ͦC. The material is sold in containers with a capacity of 1 or 5 liters;
• STIHL SynthPlus grease. highly adhesive to metal surfaces. Composition shows high performance in at least the following conditions.25 ⁰C;
• Husqvarna Bio Advanced. performs equally well in both normal and extreme conditions. The fluid has a well-balanced composition and very good adhesive properties;
• Makita Biotop grease. one of the top products. that reliably protects the sawing tools from excessive friction and premature wear. The price of this oil is considerably lower than STIHL products;
• Oleo-Mac Polar Lube is a budget-priced grease with excellent viscosity and adhesion characteristics.

For each of these lubricants, manufacturers advise using no more than 5 mg of grease per work cycle.

## Cooking the fuel mix: petrol and oil proportions for the chainsaw

The chainsaw engine is the “heart” of the tool, so it is very important to use the right fuel mixture.

Chain saw fuel mixture is made of two components. oil and gasoline. Gasoline chainsaws are equipped with a two-stroke engine, so oil is not added to the lubrication system (like 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 way you will “kill” the chainsaw very quickly.

It is essential that you use oil intended for two-stroke engines in forestry machines (i.e. never for boat engines 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 one can use gasoline A-90 or A-92, but in post-Soviet countries the quality of gasoline is inferior to European, so in our realities it is better to use high-quality gasoline.

As for the petrol-oil mixture proportion itself, everything is simple: you need to 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 ratio of oil and gasoline to the chainsaw of famous manufacturers is 1:40 or 1:50, which means 1 part of oil to, for example, 40 parts of gasoline.

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

As for the budget chainsaws made in China, the situation is slightly different. gasoline to oil ratio for chain saw Made in China 1:25, that is 1000 ml of petrol divided by 25, you get 40 ml of oil. The thing is that in branded chainsaws good assembly and the distance between the pistons and cylinders in the engine is much smaller than in Chinese chainsaws, so the required amount of oil is almost twice as different.

In order to measure the right amount of oil, use an ordinary medical syringe of sufficient volume.

One more thing to be careful with. fill up the dry gasoline canister first and then the oil. The procedure on the contrary is fraught with low quality fuel mixture, because the oil is denser, it will stick to the bottom of the canister. So there is no way to mix it well.

Always prepare the fuel mix in a fuel can and fill the fuel tank with ready-to-use special fuel! Never mix or mix the fuel directly in the gasoline tank of your chainsaw!

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

The fact that the oil currently on the market is not synthetic, but organic, that is natural. After 10 days all lubrication properties are gone, gasoline simply “eats up” the oil. Naturally, you should not use such fuel, it can cause malfunction and damage to your 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 had 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 mixture during storage. It is recommended to use the ready mixture for the next few days.

The mixture of petrol and oil with a month’s storage time worsens the traction of the engine. There is also the formation of tar compounds in the fuel system and intensive carbonization in the combustion chamber, loss of mobility of piston rings.

• It is advisable to store gasoline with oil for not more than 2 weeks with minimal damage to its quality. At ambient temperatures of 25 degrees or more, this period is reduced to 8-10 days.
• To save on fuel, you can use up old mixtures, mixing them into a fresh mix of no more than 10.

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

## Peculiarities of the running-in of a new tool

This includes gentle operation of the chainsaw at the initial stage of its operation. The technology also includes running the engine on a mixture with 20% more engine oil.

For the run-in time in engine hours please refer to the instruction manual. In practice, 3-5 refuellings of the gasoline tank are enough to reach the working level of the tool.

New models do not need a running-in period, but it is not recommended to use the chain saw for the first few hours under heavy load.