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It depends on the brand of trimmer you bought. Stihl, Echo, Husqvarna use 50:1, or 1 gallon of GAS to 2.6oz of 2-stroke oil Weed Eater, Poulan, and Poulan Pro use 40:1, or 1 gallon of GAS to 3.2oz of 2-stroke oil Ryobi's use 32:1, or 1 gallon of GAS to 4oz of 2-stroke oil
50 to 1. 1 gallon of gas to 2.6 oz of 2-cycle engine oil.
The mixture is a 40:1 ratio, that's 3.2 oz of two cycle oil to 1 gallon of gas
2.56 oz. to one gallon
The ratio is 40:1 which come to 3.2oz of oil per gallon of gasoline.
2.6 ounces of oil per gallon of gas. A 50 to 1 ratio.
A 40:1 ratio would work out to 3-3.5 oz. of 2 cycle oil, to one gallon of fuel.
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.
A 40:1 ratio would work out to 3-3.5 oz. of 2 cycle oil, to one gallon of fuel.
The operators manual calls for a 50:1 ratio or 2.6 oz per gallon of unleaded gas.
From Poulan website: The fuel-oil mixture ratio for all Poulan two-cycle products is 40:1. You can obtain this ratio by mixing 3.2 oz. of oil with one gallon of regular gas. If you have other brands of equipment that require different fuel/oil ratios and you don't want to mix separate fuel cans, you should use the lowest numerical ratio. For example, if you have products requiring 40:1, 50:1, and 32:1 ratios you should use the 32:1 ratio for all products. This may cause slight smoke increase in the exhaust in the 40:1 and 50:1 products due to more oil in the fuel, but it won't damage either of the engines.
3.2 oz 2-cycle oil to 1 gallon gasoline