Arctic Cat 2436-857 - OEM Arctic Cat Part Number: 2436-857, Replaces: 2436-689 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 additve formula that protects against engine wear, carbon buildup and sludge formation. ACX is wet-clutch certified 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. OEM Arctic Cat ACX 0W-40 Synthetic 4-Cycle Engine Oil # 2436-857.