Mixing ratio: 25 parts Gasoline: 1 part Oil. If 25 gallons of gasoline are used, add one gallon of oil to the gasoline at first. Then mix thoroughly the gasoline and oil for 30 seconds. For 1 gallon of gasoline, use 1/4 cup (4 ounces) of oil.
Octane: 87 octane or higher.
Ethanol content: Up to 10% ethanol (E10) is acceptable.
Note: Always refer to the owner's manual for the specific fuel requirements of your Briggs and Stratton petrol mower.
