TRUEGARD automatic transmission fluid in a 55-gallon drum is just what you need to stock if you're running an automotive shop where you need high-quality products. This extreme-performance oil is API SN and GF 5 certified, which means it's compatible with older-model and newer-model vehicles. Because we're able to offer 55-gallon drums of TRUEGARD automatic transmission oil at such affordable prices, Keller-Heartt Oil is your one-stop shop for everything you need