Hi Shannow,welcome back.
The OHV Briggs engines don't really care.They run way cooler than your side valve Quantum.As previously mentioned the air cleaner is the most important item to prevent bore wear.Briggs still recommend sae30,but any 10w30 or 15w40 will be fine.As you know the best thing you can do is change the oil every year.
The OHV Briggs engines don't really care.They run way cooler than your side valve Quantum.As previously mentioned the air cleaner is the most important item to prevent bore wear.Briggs still recommend sae30,but any 10w30 or 15w40 will be fine.As you know the best thing you can do is change the oil every year.