What type of oil does a Briggs and stratton generator NAC 518 A use?

The Briggs and Stratton generator NAC 518 A typically uses SAE 30 oil for warmer temperatures or 5W-30 for colder conditions. It's essential to check the owner's manual for specific recommendations, as it may vary based on the model and operating environment. Always ensure the oil meets the manufacturer's specifications for optimal performance.