How much oil do you use for a 30 to 1 mix?

For a 30 to 1 fuel mix, you use 4.0 ounces of oil for every gallon of gasoline. To calculate, divide the number of ounces in a gallon (128) by 30, which equals approximately 4.27 ounces. Therefore, for each gallon of gas, you would use about 4.3 ounces of oil to achieve a 30 to 1 mix.