How Much Oil to Pour into a Chainsaw

Any gasoline equipment will regularly perform work only subject to operating rules and proper preparation of the fuel mixture. This feature also applies to chainsaws. How much oil per liter of fuel to use for refueling and how to properly prepare fuel, we will analyze in more detail.

How Much Oil to Pour into a Chainsaw

How to choose the right mineral oil

Before diluting gasoline with saw oil, it is necessary to choose the right raw materials. This will not only facilitate the process of its operation, but also increase the resource of the engine of the device.

First of all, it should be noted that almost every model of gasoline saws is equipped with a carburetor 2-stroke engine. In their design there are 2 separate tanks. For gasoline and oil. Domestic devices need the use of conventional oil mixtures, which are used to refuel motorcycles. At the same time, devices of a foreign brand require the use of exclusively branded chainsaw oil. If mixtures of a domestic manufacturer were used for this equipment, then its productivity will decrease and the service life will be reduced.

If we talk about which gasoline to pour into a chainsaw, it will optimally use fuel with an octane rating of A-95. As for oil. It is best to use a proprietary product.

As a rule, users of equipment dilute gasoline for a chainsaw with a motor or transmission oil product. Each brand has individual features that can be studied in the attached instructions. For example, the first option is used as fuel for Husqvarna appliances, and the Stihl saw is refueled only by the transmission composition.

The ratio of gasoline and oil for refueling chainsaws

After choosing gasoline and oil for a chainsaw, you need to determine their proportions, which are required for breeding. The first mixture should have a brand of at least AI92, AI95 will be the best option. Let us examine in more detail what proportions of the oil product and fuel for the chainsaw should be. As a rule, owners of equipment use 20-50 ml of an oily component per 1 liter of fuel.

The ratio of gasoline and oil for refueling chainsaws

If the question is how much oil to pour into gasoline for a chainsaw with a small power, for example, at 1.5 kW, then 25 ml per 1 liter of fuel will be required. The high power saw mixture is prepared from 30-40 ml of an oil product. For more information, see the lubricant product instruction manual or its packaging directly.

  • March 14, 2019
  • Miscellaneous
  • Svetlana Pavlova

One of the important indicators of the durability of chainsaws and their quality work is the correct observance of the ratios of the constituent liquids when preparing the fuel mixture. It is known that an insufficient amount of oil leads to excessive friction of parts and their rapid wear, and excess. To the appearance of soot, overheating of the engine. This article will discuss the proportions of oil and gasoline for the Stihl chainsaw. This is especially important for beginners who have just purchased a tool.

Chainsaw Characteristics

Each chainsaw has three main elements that ensure its operation. These include a 2-pin carburetor engine and two tanks. The fuel mixture is poured into one, the oil necessary to lubricate the chain in the other. The volume of the fuel tank is 0.25 L, which allows you to work without stopping for 45–55 minutes. The volume of oil is less than about half. With this ratio of volumes, the contents of both tanks end almost simultaneously.

When operating 2-stroke engines, the oil pump system is not used, therefore, for the Stihl chainsaw, oil in gasoline has to be added to lubricate the shaft, piston and other rubbing parts. Attempts to work on one gasoline or non-observance of the proportions specified in the instructions for compiling a fuel-lubricant mixture of two components, lead to a breakdown of the tool.

Correct proportions

Most often, in the preparation of fuel for sawing, proportions of 1:50 and 1:40 are used. This means that 50 or 40 parts of gasoline add one part of the oil. Calculations are made as follows: 1 l = 1000 ml, 1000/50 = 20 ml or 1000/40 = 25 ml, that is, in the first case, pour 20 ml in each liter of gasoline, and in the second 25 ml of oil. If there is no instruction and you do not know the proportions for the preparation of the mixture, then use the following recommendations:

  • Tool and oil of the same brand. For example, for a Stihl chainsaw, the ratio of Stihl gasoline to oil will be as indicated on the container with oil, usually 1:50.
  • The substances used for the mixture have different brands. The ratio is 1:40.
  • There is only one brand, but there is no information on the ratios of substances on oil. They breed 1:40.
  • In the absence of any data on saw and oil, the mixture is diluted in a proportion of 1:40. The only thing you need to make sure that the oil is designed for two-stroke engines.

To run a new saw in the first three refueling tank with fuel oil add 20% more. In this case, instead of the ratio 1:50, it will be 1:42, and the proportion 1:40 turns into 1:33. A liter of gasoline will require 24 or 33 ml of oil, respectively. Other break-in events with a new saw are not carried out. Manufacturers are advised to work only at the highest speeds ever. After running the tool, the usual proportions are 1:50 or 1:40. In some cases, the manufacturer of the equipment indicates other ratios, for example, 1:25 or 1:32, they must be observed.

What kind of gasoline to fill in a chainsaw?

According to experts, you should use unleaded gasoline obtained by adding lead-free additives with an octane rating of more than 90. For foreign models, gasoline of higher grades is required and branded oils of the tool manufacturers are used. Perfect considered fuel grade AI-92. How to breed gasoline for a chainsaw “Stihl 180”? In this case, the oil content in the mixture is 1:40. Ai-95 fuel is quite suitable for it, but according to professionals, it is better not to use it for chainsaws.

The fact is that it is manufactured on the basis of AI-92 using certain additives that change the quality of the fuel. These components are deposited on the internal parts of the instrument and, upon reaching a critical mass, begin to exfoliate, disrupting the operation of the mechanism. The best option is to follow the instructions that come with the selected model. Gasoline is recommended to be used fresh, because during prolonged storage in containers, octane properties are lost.

Stihl chainsaw: which oil to use for gas?

A number of manufacturers producing equipment also produce their own consumables that are adapted to the operation of a particular engine. So Stihl also produces oil exclusively for its technology. It is equipped with special additives that can compensate for the quality of the fuel, improving the lubrication and cleaning of the fuel mixture. It should be noted that Husqvarna HP oil is universal and can be used for any chainsaw. It can be used at a temperature not lower than 10 degrees.

As well as for two-stroke engines, products of the following brands are used: Sadko, Kraissmann, Oleo-mac Prosint. If you use a Stihl chainsaw, how much oil per liter of gasoline needs to be poured? The ratio will be 25 ml of additive per liter of fuel. It must be remembered that there are oils for chains and motors. They are designed for different purposes and are not interchangeable. The use of chain oil for the preparation of a fuel and lubricant mixture leads to breakage of the tool.

What brand to use motor oil?

For each model, the manufacturer advises a list of materials that must be used. It is better for the user to adhere to these recommendations, because the breakdown of the instrument due to inappropriate fuels and lubricants does not cover the warranty. In this case, the owner himself pays for the repair of the chainsaw, which can be up to 80% of its value. When it is not possible to follow the manufacturer’s recommendations, try to follow these rules:

  • Use oil designed for two-stroke engines only.
  • Do not use after expiration date.
  • Do not add used oil with a large amount of impurities to gasoline, as the tool mechanisms may be damaged.
  • Chain lubricant must not be used for the fuel mixture.
  • It is preferable to use synthetic and semi-synthetic oils, which are more expensive than mineral, but do not form harmful deposits.

How to make a mixture?

In order for the equipment to serve for a long time and properly cope with its functions, you need to know exactly how much oil you need to add to the Stihl chainsaw gasoline. Earlier, we found out that it is better to use a lubricant product from the manufacturer Stihl and unleaded AI92 or AI95 gasoline as components. Leaded grades of fuel adversely affect the operation of the unit and disable it. With these components, 20 ml of oil is added to the liter of gasoline for the mixture. Any violation of the proportions leads to the appearance of soot on candles and pistons, as well as the formation of scoring. The oils used may be green, blue or red.

By the color of the mixture, their presence is easily determined. To dilute the fuel, often complete with equipment, a special canister is attached. These tanks are marked with graduated divisions and there are two holes. It remains for the user to fill the tank with the mixture components to the required marks, close the lids and mix. Some use plastic bottles and syringes for measuring oil for these purposes. In this case, it is necessary to ensure that foreign particles or water do not get into the tank, all this will worsen the operation of the engine.

What will happen if you do not take into account the manufacturer’s recommendations?

In violation of the rules for the preparation of fuels and lubricants and non-compliance with the proportions when adding oil to gasoline at a chainsaw “Stihl 180”; The following problems occur:

  • With increasing friction, the wear of the working surfaces of the parts will increase.
  • Due to insufficient lubricant, the bearings will begin to break down.
  • The full functioning of the mechanical components is disrupted due to the premature wear of parts, their service life is significantly reduced.
  • When using low-grade grades of gasoline and oils, the performance of the unit decreases with the subsequent breakdown of important components and parts.

Fuel is prepared before refueling the saw, avoiding excessive contact with oxygen. After completion of work, the remaining mixture must be drained.

Shelf life of the finished fuel mixture

Motorists know that it’s not worth storing gas for a long time, and the finished fuel mixture deteriorates even faster. Mix the necessary proportions of oil and gasoline for the Stihl chainsaw before starting work. Manufacturers allow storage of finished fuel for up to one month, and experts recommend that this period be reduced to 10 days. Immediately after mixing, the solution begins to lose its original properties and over time it becomes completely not of the same quality as it was prepared. Learn how to prepare so much fuel for a saw so that it can be spent at a time. It comes with experience. Keep the mixture in a gasoline-resistant opaque tightly closed container. For this, any metal plastic canister for combustible materials is suitable. They also use an oil container or glass containers made of dark glass.

Chain oil selection

In addition to the motor, for which all the proportions of oil and gasoline for the Stihl chainsaw have already been figured out, there is another important part, consisting of many moving links. A chain. To lubricate it, use not motor, but chain oil. It has completely different properties and is cheaper.

For a new tool, use only the oils of the manufacturer, which are recommended in the instructions. Otherwise, if a saw breaks down, it will be removed from warranty service due to non-compliance with operating conditions. It should be noted that the oils from the manufacturer are really high quality. After the warranty period, you can use any engine oil, making it replaced twice a year.


Customer reviews of Stihl saws are mostly positive. It is light in weight and affordable. Some complaints are found on the small power of the instrument. But for periodic use at home, it is quite suitable. And if you use the right proportions of oil and gasoline for the Stihl chainsaw, then it will last for many years.

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Chainsaw Oil

Hello! In this article I will tell you how to use chainsaw oil. The information presented here is based both on my personal experience using saws and on the experience that I am a seller of this technique. This is both communicating with customers and with service masters. Plus there will be a theory. Where would it be without it.

What oil to pour into gasoline for a chainsaw?

For the manufacture of fuel consistency use a special oil for two-stroke engines. They are now a huge huge amount. But the manufacturers themselves, especially the harsh ones, such as Stihl or Husqvarna, always write which oil to mix with gasoline for their chainsaws. They are produced under the same brand, because, for example, Stihl oil is suitable for Stihl saw, and Husqvarna is suitable for Husqvarna.

At the same time, representatives of the companies claim that they do not know how the chainsaw will work with other oils, but they can definitely guarantee the proper operation of their own equipment when the fuel mixture for it is prepared on the basis of the product that they indicate in the operating instructions. By the way, if a malfunction occurs in the piston group during the warranty period, you may be denied a free repair if it turns out that you added something other than what the manufacturer indicates.

Masters from the services with whom I had to talk praise all the same Stihl and Husqvarna oils.

Mineral or synthetic oil. Which is better to add to gasoline

Two-stroke oils can be mineral or synthetic. As in the case of a car, synthetics here always cost more than mineral water. Its most important advantage will be that when used inside the cylinder of the chainsaw, no soot is created. This extends its service life. Thus, if you want the saw to serve as much as possible, fill in the synthetics.

True, it should be noted that if you have already used mineral water for a long time (more than 100 hours), then you can not use synthetics. This is due to the fact that synthetic oil, possessing cleansing qualities, will wash away the carbon deposits accumulated on their walls from the cylinder walls, and its falling off pieces can cause damage. Therefore, if you have been using mineral water for a long time, then use it.