High Performance Synthetic Motor Oil - Red Line's synthetic motor oils are designed to provide the highest protection, cleanliness and superior drain intervals with the lowest friction for your gasoline, diesel, motorcycle or marine engine. We use the most stable components available and formulate our products for wear protection and friction reduction across a wide range of engine operating conditions. Red Line's products are unique because they contain polyol ester base stocks, the only lubricants which can withstand the tremendous heat of modern jet engines. These synthetics have a natural multigrade property which allows our chemists to avoid bulking up an oil with unnecessary additive packages. High Performance Synthetic Race Oil - Red Line's Racing Oils have a global reputation as the ultimate racing lubricant--many teams who have found that the improved performance and equipment durability is the key to winning. Our oils are made with the most thermally stable synthetic base stocks available and provide the best high-temperature lubrication and a higher film strength than any petroleum or synthetic on the market today. Although Red Line racing oils are categorized as "straight grades", their low-temperature properties make them exceptional multigrades, allowing 2-4% more power than an oil of similar viscosity, while providing much more protection. Each reduction in viscosity grade allows 1-2% more power. To reduce the chance of detonation, our race oils contain very few detergents and are not recommended for street use.