The Toro Premium 4-Cycle Lawn Mower Engine Oil 10W-30 is specially formulated to meet specific 4-cycle engine manufacturer requirements calling for 10W-30. This lawn mower engine oil provides the ultimate protection for all 4-cycle OPE engines. The lawn mower engine oil is developed with Toro engineering to meet the standards for all air-cooled, liquid-cooled and diesel engines. To maximize the performance of your Toro lawn mower, we highly recommend using this Toro lawn mower engine oil, which has been specifically formulated for best results. The lawn mower engine oil provides extreme performance in all temperatures, enhancing the life of your lawn mower's engine.