You can buy 2-cycle oil already pre-measured for 1 gallon of gasoline. However, if you buy the larger container of 2-cycle oil to save money, you need 3.2 ounces of oil to one gallon of gasoline for a 40:1 mixture.
The ratio is 40:1 which come to 3.2oz of oil per gallon of gasoline.
There is 128 oz in a liquid gallon so to achieve a 40 to 1 ratio you would add approximately 3.2 oz of 2 cycle oil to one gallon of gasoline.
If you're talking about mixing oil to gasoline, it means 40 parts gasoline to 1 part oil. Most 2 stroke oil containers have a chart on them showing how much oil to add to different amounts of gas. For a gallon of gas, you'd add 3 ounces of oil. You're best off using synthetic oil, it won't foul your plugs if your mixture is too rich.
go to the john deere official site,50:1 if you use there oil it"s all there
3.2 oz 2-cycle oil to 1 gallon gasoline
40:1
990ml 10w 40 semi
That is 40 parts gasoline to 1 part oil.
To mix a 40:1 gas ratio, you'll need 40 parts gasoline to 1 part two-stroke oil. For example, if you use 1 gallon (128 ounces) of gasoline, you would add 3.2 ounces of two-stroke oil (128 ÷ 40 = 3.2). Mix thoroughly in a clean container before using it in your two-stroke engine. Always double-check the manufacturer's recommendations for your specific equipment.
40 parts gasoline one part two cycle oil
40:1 means 40 parts gasoline to 1 part oil. So 40 OZ. of gas to 1 OZ. oil. If you wish to mix one gallon of gas, 128 OZ, you would add 3 OZ of 30 weight non-detergent oil (30wt ND), also sold (with green dye added, at a premium price) as "two-stroke oil."
On a car, 40 liters.