(5w20) - Replacement for OE factory-fill oils in many new Ford and Honda passenger cars and light trucks. Excellent performance in weather where cold starting and short running duration are concerns.

(5w30) - Provides the quickest starts and fastest oil pressure rise. Will reduce turbo lag and provides more power and best economy in an engine in good condition. Replacement for OE factory-fill oils in passenger cars and most light trucks, including most new GM cars and trucks. Thicker oil film at operating temperature than a petroleum 10W-40. Best choice for engines operated in extreme cold weather.

(5w40) - Our 5W40 engine oil provides for quicker lubrication and easier start-up. Reduces turbo lag and provides more power and economy in a properly functioning engine, while providing 25% thicker oil films than a petroleum 5W40 or 10W40. Recommended for many late-model European vehicles and as a factory fill replacement in many newer VW, Porsche, and Mercedes Benz applications.

(10w30) - Great all-weather viscosity grade for gasoline engines in cars and light trucks that are driven on the street on a daily basis. More power and economy while providing thicker bearing oil films at operating temperature than a petroleum 10W-40. Best choice to replace a 5W-30 or 10W-30, petroleum-based or other-brand synthetic oil if maximum durability is preferred. Acceptable for engines that are occasionally operated in extreme cold weather.

(10w40) - Best choice for engines that typically run high oil temperature or for engines in daily-driven vehicles regularly operated in hot weather. Great for medium and heavy duty gasoline engines in trucks. Best choice for high-performance engines that see street/strip or track activity. Features a thicker oil film at operating temperature than a petro-based 20W-50.

(15w50) - The ultimate high-temperature protection in Red Line engine oils recommended for street use. Good for engines that regularly run very high oil temperatures. Best for engines that run large clearances such as air-cooled engines or large-displacement, all-out racing engines that see occasional street use. Provides 25% more viscosity in bearings than petroleum 20W-50s. Not recommended for use in cold climates where temperatures are at or below 10F or -12°C. Not recommended for street use in production engines that see sustained oil temperatures below 225°F (those engines should use Red Line 10W-30 or 10W-40).

(20w50) - The ultimate high-temperature protection in Red Line engine oils recommended for street use. Good for engines that regularly run very high oil temperatures. Best for engines that run large clearances such as air-cooled engines or large-displacement, all-out racing engines that see occasional street use. Provides 25% more viscosity in bearings than petroleum 20W-50s. Not recommended for use in cold climates where temperatures are at or below 10°F or -12°C. Not recommended for street use in production engines that see sustained oil temperatures below 225°F (those engines should use Red Line 10W-30 or 10W-40).