How to Mix Gas and Oil for Chainsaw Fuel

Fueling a chainsaw is not quite as straightforward as putting gas in your car. Two-stroke engines, like the one in your chainsaw, require a mixture of gasoline and oil. If you don't properly mix oil into your fuel, you will quickly ruin your chainsaw's motor.

Difficulty: Easy

Instructions

1. Check your manual for the proper gas-and-oil mixture. For almost all modern two-stroke engines, a 50-to-1 mixture is recommended. That requires about 2 1/2 oz. oil for every gallon of gasoline.

2. Use only two-cycle oil for your mixture. This oil is made especially for these engines and can be purchased at gas stations, hardware stores or any other place where you buy regular motor oil.

3. Pour the proper amounts of gas and oil into a fuel can. Shake the can well to mix it.

4. Label your gas can with the mixture ratio. You can use the same mixture for other two-stroke engines.

5. Shake your fuel can thoroughly every time you refuel. After a while, the oil will settle out of the gas, and shaking it up ensures that the oil and gas are properly mixed again before you put the fuel into your chainsaw.

Tips & Warnings

• If you put your chainsaw through more use and abuse than normal, a 40-to-1 mixture might benefit the motor. That requires about 3 1/2 oz. oil for every gallon of gasoline.
• Gasoline and oil are both toxic and flammable. Use caution whenever working with these volatile liquids.

[lockman]

on 7/31/2009 what happen to the motor, if you didn't shake up the mixture in the fuel.