Bel-Ray ATV Trail Mineral 4T Engine Oil - 10W40-4L. 99050-B4LW (1) Premium multi-grade mineral engine oil Designed to meet the unique demands of all 4-stroke ATVs, Quads, and UTVs Features a rust defense system that coats internal engine components providing unsurpassed rust and corrosion protection Anti-wear chemistry eliminates wear, extending engine life Will also work with air-cooled/liquid-cooled 4-stroke engines