Briggs & Stratton lawn mower oil is proven to meet the demands of our 4-cycle engines. Keep your small engine running strong -- order genuine B&S lawn mower oil today! Tested and approved by Briggs & Stratton engineers. Warranty certified and recommended in all Briggs & Stratton manuals. A high quality detergent oil classified SJ/CD by the API-Conveniently sized for today's engines 18 Fl. oz. (.532 L) Briggs & Stratton Genuine Part Designed specifically for our engines and can save on costly repairs while maintaining valuable warranty coverage.