Tufoil Engine Lubricant is Guinness Book of World Records certified as "The World's Most Efficient Lubricant." Slipperier to make engines start easier, run cleaner, faster, and longer. Tufoil is a super-suspension of micro-miniature PTFE particles and soluble Molybdenum, permanently suspended in oil. All moving parts become coated with PTFE particles which reduce friction and wear and will not clog filters or oil openings. Safe for all gas and diesel engines. 1 Gallon!