Arctic Cat 2436-858 - Advanced multigrade 4-cycle all weather formula Superior rust and corrosion protection even during periods of nonuse Offers maximum engine performance along with unique shear-stable additive formula that protects against engine wear, carbon buildup and sludge formation ACX is wet-clutch certifi ed for use in Arctic Cat Off Road wet-clutch engines Automotive engine oils DO NOT meet the requirements for use in Arctic Cat Off Road ATVs equipped with a wet clutch Arctic Cat OEM 1 Quart ACX 0W-40 Synthetic Oil Part# 2436-858.