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How to Mix Oil & Gas for a Ryobi Gas Trimmer

By Kenneth Crawford ; Updated September 21, 2017
Mix a 32:1 ratio of gas and oil for your Ryobi trimmer.

The Ryobi gas trimmer uses a fuel mixture with a ratio of 32:1 to power the engine. The 32:1 ratio is a mix of unleaded fuel with two-cycle engine oil. It is a good idea to keep a gas can set aside strictly for fueling your gas trimmer. This will prevent accidentally placing straight fuel into your trimmer and damaging the engine. Most trimmer malfunctions are a direct result of improperly mixed fuel in the engine.

Use a clean 1-gallon gas can specifically for fueling your Ryobi gas trimmer.

Pour a 4-ounce can of two-cycle engine oil into the clean gas can.

Pour 1 gallon of unleaded gasoline into the gas can.

Close the gas can lid and swirl the fuel mixture around to thoroughly mix the fuel in the can.

Pour a fuel stabilizer into the fuel mixture if the gasoline you are using is a blended gas. Ryobi recommends using STA-BIL as a fuel stabilizer for the fuel mix. Use the stabilizer according to the instructions on the can.


Things You Will Need

  • Clean gas can
  • 4-ounce can two-cycle engine oil
  • 1 gallon unleaded gasoline
  • Fuel stabilizer


  • Gasoline is highly flammable. Always stop the trimmer and allow the engine to cool before adding fuel.
  • Never mix fuel directly in the Ryobi gas trimmer fuel tank

About the Author


Kenneth Crawford is a freelance writer with more than 10 years of experience. His work has appeared in both print and online publications, including "The American Chronicle." Crawford holds an associate degree in business administration from Commonwealth College.