What kind of oil to use in a brigs and stration 12 hp?

For a Briggs & Stratton 12 HP engine, it is recommended to use SAE 30 weight oil for warmer temperatures or 5W-30 for cooler temperatures. Always check the owner's manual for specific oil recommendations, as some models may have unique requirements. Additionally, using high-quality detergent oil is essential for optimal engine performance and longevity.