What oil do you use for a 12.5 hp Briggs and Stratton motor?

u use olive oil What, too good for Canola? Nothing beats SAE 30 straight weight. Detergent is OK. Briggs & Stratton 5w-30 synthetic is the best, but pricey. Try not to use regular 5w-30 or 10w30, they can't handle high temps as well. That will void your warranty. Change every 50 hours.