Briggs & Stratton 5W-30 Full Synthetic 4-Stroke Small Engine Oil - 18 oz. What’s running under the hood of your machine matters. This 5W30 synthetic engine oil is brought to you by one of the leading brands in the industry, Briggs & Stratton. This oil is SAE approved and contains a special blend of anti-coagulants to prevent oil from going “stale” in an idle state. In order for your engine to run in pristine condition, the engine needs lubrication and changing your oil should be a main focus on maintaining your outdoor power equipment. To ensure that Briggs & Stratton synthetic engine oil is best for your outdoor power equipment, please reference your owner’s manual. Promotes long-term engine durability Fully Synthetic Approved from SAE Scientifically proved to give unparalleled performance during different weather conditions Viscosity: 5W-30