Product Description Lucas High Performance Semi-Synthetic 2-Cycle Oil has been specifically developed to give a long trouble-free life to gasoline-powered 2-cycle engines. Designed for any oil injection system or pre mix up to 50:1. Use in Snowmobiles, Weed Eaters, Leaf Blowers, Chain Saws and more. Amazon.com Motor oil is made from crude oil and is used to lubricate, clean, and cool engines. Types of motor oil include conventional, synthetic, diesel, bio-based, hybrid (blends of conventional and synthetic), and recycled oils. Motor oil varies in weight and viscosity, as well as additives that some manufacturers add to the oil during the refining process. A numerical code system created by the Society of Automotive Engineers (SAE) grades motor oils according to viscosity--the higher the number between 0 and 60, the more viscous (thicker) the oil is. Most consumer motor oils are graded by two numbers, with the first number indicating cold weather (Winter or "W") performance.2-Stroke Engine OilThis oil is specifically designed for 2-stroke (or 2-cycle) engines. 2-stroke engines are typically "total-loss lubrication" engines, meaning that this oil will burn up in the combustion chamber when the engine is on and will need to be replaced regularly. Common uses of 2-stroke oil are some motorcycles, lawnmowers, snowmobiles, marine outboard motors, and other small-engine devices.Semi-Synthetic OilThis oil is a semi-synthetic oil, meaning only some crude oil is used in making it. Semi-synthetic oil can be used in vehicle engines instead of motor oils refined from crude oil, and often provides superior mechanical performance over traditional motor oil, including increased gas mileage and reduced engine wear at extreme temperatures. Its complex method of production means it can often cost more than conventional motor oil. Please note that you should not mix quarts of synthetic and conventional motor oils in your vehicle, and if you use semi-synthetic or full synthetic oil in your vehicle, you should not change the oil with conventional motor oil.Racing OilRacing oils are designed for track cars and other types of high-compression vehicles intended for motorsports competition. They contain particular additives for increased engine horsepower and reduced friction on metal parts, and provide special protection for engines with high compression or higher horsepower. Racing oils usually include fewer detergents than regular conventional motor oils. Please note that many, if not all, oils labelled as racing oils are not street legal, and it is not recommended to put racing oil in a conventional passenger vehicle. Make sure to double-check the product label as well as the specifications of your vehicle to ensure proper usage.