How Do You Determine Oil and Gas Ratios for Two Stroke Engines?

How Do You Determine Oil and Gas Ratios for Two Stroke Engines?

The best way to determine the oil and gas ratio for two-stroke engines is to consult the owner’s manual for the equipment. The owner’s manual tells the user the exact ratio of oil-to-gas for two-stroke engines based on the type of equipment.

Two-stroke engines, also known as two-cycle engines, run on a specific oil-to-gas ratio. Equipment owners must use oil specifically labeled for two-cycle engines. Major retailers and online auto parts stores carry two-cycle engine oil. Synthetic oil works for two-cycle engines as well. Automotive experts recommend to avoid gasoline over 30 days old when adding it to the oil.

The best way to determine if an engine is two-cycle is to look at the cap on the fill port. If the cap reads “fuel/oil,” then the engine is a two-cycle. If the engine contains two fill ports, one for oil and one for gas, then the engine is a four-stroke, or a four-cycle. Briggs and Stratton recommends that for every one gallon of gasoline, consumers should mix 2.6 U.S. ounces of approved two-cycle engine oil. However, consumers must consult their owner’s manual since every type of equipment with two-cycle engines have different oil-to-gas ratios. Two-cycle engines propel lawn mowers, gas-powered weed eaters and snow blowers.