Red line 15W-50 Motor Oil is for wider bearing clearances and engines that see occasional street use. This oil is popular in turbocharged applications. Features 25 percent more viscosity than petroleum 20W-50s. Fully-synthetic ester formula for passenger cars, light trucks, performance vehicles and marine applications. Excellent wear protection and friction reduction across a wide range of operating conditions. High detergency allows extended drain intervals and provides increased cleanliness. Improved fuel economy and ring seal for more power. Superior high temperature stability and oxidation resistance increases lubrication of hot metal compared to other synthetics. High natural viscosity index (VI) provides thicker oil film in bearings and cams.