Most times it will tell you on the gas cap, it is usually 40 or 50 to 1. If you buy any two cycle oil it will work. Most two cycle oil will have a mix ratio on the container. 40 to 1 is 3 ounces oil per gallon of gas and 50 to 1 is 2.5 ounces per gallon of gas.
Brian Swavey, June 2007
