It's important to use the correct amount of oil as inadequate oil levels can cause lubrication issues, leading to increased wear and potential damage to the engine. Overfilling the oil can also cause problems, as excess oil can lead to increased crankcase pressure and cause oil to enter the combustion chamber, resulting in smoking and reduced performance.
When changing the oil in your 11hp Briggs & Stratton engine, make sure to use a suitable oil that meets the viscosity and quality requirements recommended by the manufacturer. It is also advisable to replace the oil filter, if applicable, to ensure efficient filtration of contaminants from the oil.