Keep Your Mower Running Smooth with Super S 40048 HD30 Oil A strong running mower is a well lubricated one and Super 48 oz. HD30 Lawnmower Oil will keep you running at full power. This lawnmower oil is specially designed for 4 stroke engines. It will make sure that all the internal parts are well lubricated and sealed for maximum efficiency. This can be used in other 4-cycle lawn and garden power tools, as well as the mower. Keep your tools healthy and strong with the right oil.