What Type of Oil Should Be Used for a Two-Stroke Gasoline Engine?

[CadenLee]

For high-power two-stroke gasoline engines, it is recommended to use SG grade or higher, or synthetic oil. Below are some relevant details about the oil: 1. Ratio: The optimal gasoline-to-oil mixing ratio is generally controlled between 20-25:1. Lubrication method of two-stroke internal combustion engines: Two-stroke gasoline engines primarily use a pre-mixed fuel and oil (50:1) that enters the cylinder and circulates inside the engine, lubricating mechanical parts such as bearings, cylinders, and pistons. A portion of the oil is burned in the combustion chamber, while the remaining portion is expelled unburned through the exhaust system. 2. Precautions: When oil is exposed to the high-temperature and high-pressure environment of the engine for extended periods, it continuously mixes with harmful substances. Over time, chemical changes occur, causing the oil to thin, become dirty, and produce sludge.