OEM Replacement for Kohler / Rehlko Synthetic Blend Engine Oil 10W30 2 PK 25 357 64-S 1 Quart Part # 25 357 64-S Unlike standard automotive motor oil, KOHLER - REHLKO oil is specially formulated for small engines. Heavy-duty additives offer protection against oxidation, viscosity breakdown and acid contamination from combustion by-products, wear and friction