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40:1 is the gas to engine oil ratio. Better said. 1 gallon of gas to 3.2 oz of 2 stroke engine oil. McCulloch has a product, "One Shot", that conveniently comes in a 3.2 oz container.
If using an oil other than McCulloch, the ratio is 40:1. Brand Specific McCulloch two cycle oil is 20:1.
A. . McCulloch has written: 'Gas analysis'
Hi, Back when it was manufactured, it called for 16:1. Gas was different back then also. Mixing at 32:1 with a high quality oil should work fine.
mine says 40:1 on the gas cap, and its the origanal cap. hope this helps.
Generally the ratio the oil is blended for. Most are 40:1 or 50:1. Most containers of oil are made to mix with a certain amount of gas.
The proper mixture is 40:1 or 3.2 oz oil to 1 US Gallon of gas.
My DT150 has an automatic oiler on it. When ideling the service manual say it mixes at about a 100:1 ratio and at wide open throttle it is 50:1. I have read several things stating that if you do not use the automatic oiler you shoul mix you ratio at 50:1.thats 16 oz. oil to 6 gallons gas
most two stroke engines need a 2% mix but you should look at the manufacturer recomondation.
Used to be 32:1, but now with modern oils and weak gas it is 50:1. Fear not as these oils are by far superior,
the ratio is 999 degress nort