The levels of zinc and phosphorus blended into these lubricants are among the highest in the industry and combine well with Red Line's chemistry, designed to seal piston rings for more power, fight fuel dilution, extend drain interval and provide stronger film strength over a range of temperature. This oil also features lower levels of friction modifiers for superior wet clutch operation. Excellent thermal stability, oxidation resistance, cleanliness, and ability to lubricate hot metal make Red Line High Performance Motor Oil a superior lubricant. Recommended for JASO MB, API SJ, SG, & SH.