Red Line's highest temperature protection engine oils recommended for street use. Excellent for engines that run large clearances such as air-cooled engines or large-displacement, all-out racing engines that see occasional street use. Red Line 20W50 provides 25% more viscosity in bearings than petroleum based 20W50 oils. Red Line does not recommended 20W50 for use in extremely cold climates. It is also not suggested for street use in production engines that see sustained oil temperatures below 225F (those engines should use Red Line 10W30 or 10W40).
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