Question: what is the difference between 40 to 1 and 50 to 1?
Answer: 50:1, or 50 parts gasoline to 1 part 2-cycle oil is 2.6 ounces of oil per gallon of gasoline. ... Superior oil is synthetic, or blended synthetic oil. There is very little difference in 50:1 and 40:1 fuel mix. The market had already adopted the 50:1 ratio before the EPA set their standard at 3.2 ounces per gallon (40:1).