Stihl Chainsaw How Much Oil Per Liter Of Gasoline

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.

Stihl Chainsaw How Much Oil Per Liter Of Gasoline

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.

Household and professional chainsaws are powered by two-stroke ICEs operating on a dosed mixture of gasoline and engine oil adapted to the difficult operating conditions. The correct proportions of oil and gasoline for a chainsaw is one of the important conditions for stable traction characteristics of the engine and low-cost development of its assigned resource.

The need to obtain a sufficiently high power from a small-cubic power unit makes it necessary to operate gas-powered engines in high-speed modes, therefore, increased demands are placed on the quality of both components of the fuel mixture.


The main component of the fuel mixture for gasoline-powered engines is gasoline with an octane rating of at least 92. Consumables with expired storage made on the basis of gas condensate with water and mechanical impurities are not suitable for fuel preparation.

  • Opinions of experts on the use of gasoline of various brands are mixed. On the one hand, incomplete compliance of domestic A-92 gasoline with European standards is recognized.
  • On the other hand, the quality of A-95 gasoline is questioned because of the high content of anti-knock additives. Use this fuel for the preparation of fuel for a chainsaw is possible only with full confidence in its quality.
  • The difficulty lies in the presence of various improving additives, with the help of which unscrupulous manufacturers and distributors increase the operational properties of motor gasoline with a lower octane rating.

Irreversible changes in the working properties of the fuel also occur when it is stored for a sufficiently long time in a plastic container, regardless of the level of its benzo and oil resistance.


Stringent selection criteria for the oil component. In the best case, this is a mineral or semi-synthetic engine oil recommended by the manufacturer, intended for use in high-speed two-stroke ICE with air cooling.

The advantage of mineral oils in their lower cost. Their more expensive semisynthetic and synthetic analogues are favorably distinguished by improved performance and compliance with environmental standards.


  • Keep working properties in a wide range of working temperatures;
  • Do not form soot;
  • Contain detergents, antioxidants, preservatives and other additives useful for the operation of the power unit.

Benefits of Branded Oils

Many domestic and foreign manufacturers specialize in the production of special motor oils, but Stihl, Husqvarna and Makita branded products have the highest ratings.

Only in certain parameters are domestic motor oils of the Lukoil trademark inferior to the branded assortment.

→ HUSQVARNA FOR THE BEST PRICE The list of advantages of branded motor oils:

  • Economical consumption;
  • Stability of performance in difficult operating conditions and during long-term storage;
  • Minimum amount of toxic compounds in exhaust gases;
  • Almost complete absence of soot.

According to the American classification, API-TB oils can be used to work in household and professional models. The Japanese counterpart is JASO-FB and JASO FD. The preparation of a combustible mixture using oil for 4-stroke engines is strictly excluded.

Red, green or any other color of oil determines whether the product belongs to the assortment of a particular manufacturer, therefore, it is not taken into account when determining the characteristics of the material. Extremely cautious should approach the choice of engine oil of unknown composition and origin.

Before receiving additional information about the quality and operational parameters, it is better to temporarily refuse to use such material.

It is allowed to mix motor oils of the same types and composition for the production of well-known brands of the quality of their assortment. Under no circumstances is it permitted to mix mineral and synthetic oils.

Self-selection criteria

A large assortment allows you to choose oil that fully meets the class and characteristics of the chainsaw, the conditions for its subsequent operation.

  • For budget models, you can use oils of the Standard category, for professional chainsaws, lubricants of the Super and Ultra categories are recommended.
  • To prepare a complete fuel mixture for a chainsaw, it is advisable to use branded oils recommended by the instruction manual or their brand analogues. In particular, Stihl and Husqvarna engine oils of the same composition and application are completely interchangeable.

Experts recommend that owners of chainsaws exclude motor oils intended for two-stroke engines of mopeds, boat engines and other mechanized appliances of the household group from the spotlight.

The power units of this equipment operate in more comfortable conditions, which makes the requirements for their operational characteristics less stringent.

Chinese oil dosage

Many Chinese-made chainsaws are simplified copies of popular models of European design. No special materials and proprietary technologies helps preserve legacy proportion of gasoline and oil in a ratio of 25: 1.

Twice the consumption of engine oil is offset by its lower cost. According to the assurance of the developers, the original components are introduced into the composition of Chinese oils, which contribute to increasing the wear resistance of power units and real extension of their assigned resource.

According to independent experts, the best brands of Chinese motor lubricants in quality correspond to analogues of European manufacturers in the mid-price range. This is the level of standard engine oils of the Standard group and partially Super.

Caution. Counterfeit!

Small private companies from China and other Asian countries specialize in the production of motor oils, which are sold at less cost in the markets under the brand name of leading manufacturers.

  • Characteristics of fake products are much lower than branded originals. The constant use of counterfeit negatively affects the operation of the chainsaw and the durability of its operation.
  • Only an experienced specialist can determine the status and quality of the oil, so you can avoid possible risks by buying consumables in a network of branded and licensed outlets.
  • The use of substandard lubricants for service specialists is a legitimate reason for depriving the owner of a faulty saw of warranty repair and restoration obligations.

The working proportions of the fuel mixture

The standard ratio of gasoline and oil in the fuel mixture for chainsaw carburetor engines of different models is 40: 1 and 50: 1. This proportion provides a complete lubrication of the rubbing parts of the crank mechanism and piston group, and also does not prevent the complete combustion of the gasoline-air mixture.

Taking into account external factors, the fuel mixture can be adjusted in the direction of increasing the amount of oil. Such a need arises at the stage of running in a new tool, as well as at high air temperature. In this case, the standard dosage of oil is increased by 20%.

In practice, an increase in the percentage of oil in the fuel mixture is applied if its characteristics do not fully meet the stated requirements. How much oil per liter of gasoline is needed in each case, the sawmill determines.

Measured tanks

To maintain the correct proportion of gasoline and oil, a spreadsheet applied to the saw body may be used. The branded packaging of leading manufacturers of motor oils is equipped with built-in measuring devices that provide an accurate dosage of oil for different volumes of the fuel mixture.

Measuring utensils included in the original set of many models of chainsaws budget category. In some cases, dilute gasoline and oil in a predetermined proportion will medical syringe volume of 20 cm3.

Features of the preparation and storage of the fuel mixture

Safety regulations require that gasoline and oil be diluted in a metal canister. This eliminates the risks of static electricity and fuel ignition.

Experts advise pouring oil into an incomplete container, mix thoroughly, and then add pure gasoline to a predetermined level. It should be excluded from everyday practice the saving of working time by preparing the working mixture directly in the gas tank of a chainsaw.

This technology is fraught with fuel system failures due to the ingress of a large amount of oil into the carburetor, the need for disassembly and thorough washing.

Storage recommendations

It is better to cook the mixture in an amount that should be enough to perform one-time work. The problem lies in the irreversible deterioration of the working properties of the mixture during storage. The finished composition is recommended to be used over the next few days.

A mixture of gasoline with a monthly oil degrades the engine’s traction capabilities. There is also the formation of resinous compounds in the fuel system and intense carbon formation in the combustion chamber, the loss of mobility of the piston rings.

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

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

Features of running a new tool

This concept includes the gentle operation of a chainsaw at the initial stage of its operation. The technology also provides for engine operation on a mixture with a 20% increase in engine oil content.

Break-in time in hours is indicated in the attached instructions. In practice, for the tool to reach the working level, it is enough to develop 3-5 gas stations for the saw’s gas tank.

New models do not need a run-in, but the first hours of operation of the chainsaw are not recommended for use with heavy loads.

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 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.