Sae 30w if it is over 50 Fahrenheit. 10w-30 if it is under.
sae30
10w - 30
straight 30 or a 10w30
SAE-30
Briggs Stratton makes many different lawn mower parts. On their website one can find standby and portable generators, pressure washers, cleaning systems and snow blowers.
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
The recommended oil is 5w30 full synthetic oil.
SAE 30 SF or better rating
The oil to use for the 26hp Kohler motor on a Craftsman garden tractor will depend on the temperature outside. Use a 10-30 blend in the summer and a 5-30 blend in the winter months. The brand of oil does not matter as long as it is not a synthetic blend.
Generally Briggs calls for 30W but you can also use 10w30 especially if you are using it in cool temperatures.
It looks like a custom made "antique" that resembles an early motorcycle. It appears to have a Briggs & Stratton motor. I would say an 1900ish blackhawk.