Pennzoil (3854-12PK) Premium Outboard and multipurpose 2-Cycle Marine Engine Oil - 1 Quart, (Pack of 12) Premium outboard and two-cycle oil contains only ash less components which prevent any lubricant related pre-ignition and plug fouling; the ash less additives protect against piston and combustion chamber deposits, rust and corrosion Also acts as a multipurpose gear oil Maximum additive treatment, including increased detergency over the TC-WII formulation, protects your engine against failures due to scuffing, ring sticking, port deposits bearing failures and plug fouling TC-W3 approval mean that your warranty is safe and that you are using the most advanced technology available Helps keep spark plugs and exhaust ports clean Formulated to keep your marine engine running clean Also acts as a multipurpose gear oil Guard against harmful engine deposits Protect against piston-scuffing Keep performance-robbing carbon deposits from forming in the combustion chamber, piston tops and under crowns and piston-combustion rings