The mathematical ratio representation 25:1 means 25 parts fuel and 1 part oil. It's normally easiest to mix in larger quantities than 1/2 gallon. It is usually used to represent an oil fuel mixture that is mainly used in motor vehicles and heavy commercial machinery.
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what does 25 1 in mixing 2 stroke mean
A two-stroke, or two-cycle, engine is a type of internal combustion engine which completes a power cycle in only one crankshaft revolution and with two strokes, or up and down movements, of the piston...