What is the best oil recommended for Briggs and stratton 13.5 hp engine?

For a Briggs and Stratton 13.5 HP engine, the recommended oil is SAE 30 for warmer temperatures or 5W-30 for colder climates. It's important to use high-quality detergent oil that meets API service classifications. Always check the owner's manual for specific recommendations and ensure the oil is appropriate for the operating conditions. Regular oil changes will help maintain engine performance and longevity.