What makes a Briggs and stratton ohv engine blow oil?

A Briggs and Stratton OHV engine can blow oil due to several factors, including worn piston rings, a damaged cylinder, or faulty valve seals, which can allow oil to enter the combustion chamber. Additionally, excessive engine wear or incorrect oil viscosity can lead to increased pressure in the crankcase, causing oil to escape through seals and gaskets. Regular maintenance and using the correct oil can help prevent these issues.