SAE 30 in the summer and SAE 10w30 in the winter. I highly recommend you use 100% synthetic oil in this air cooled engine.
10w - 30
SAE-30
Generally Briggs calls for 30W but you can also use 10w30 especially if you are using it in cool temperatures.
SAE 30 SF or better rating
Briggs and Stratton only recommend using their own brand of lawnmower oil. This oil is available in stores for around $6 for 18oz. This particular oil is designed to be compatible with air cooled engines.
the best would be to use 10w-30 synthetic oil all year long
Briggs and stratton engines use different oils depending on the temperature to which the engines will be used. Generally sae30 oil should be used for mower engines
Most Briggs engines that small take 1 pint of oil .
sae30
The recommended oil is 5w30 full synthetic oil.
During the summer a 30 weight oil is all that is recommended. During winter operation a 10W-30 oil is reccomended.
10w30 0r 10w40 both seem to work well.