The Briggs and Stratton 550EX is used on various push mower brands and features easy start technology. Changing the oil in the Briggs and Stratton 550EX is very simple to do at home but a little different from different motors. This push mower is a Troy Bilt, but the same engine is used on Craftsman, Snapper, and Poulan Pro. The oil change should be performed at the beginning of each mowing season. The oil type for this engine is 30wt.