Pennzoil, Gallon, Marine Premium Plus Outboard 2 Cycle Oil, Synthetic Blend, TC-W3 Lubricant, Specifically Designed For Exceptional Performance In Marine Applications, Contains Only Ashless Components Which Helps Prevent Any Lubricant Related Preignition & Spark Plug Fouling & Helps Protect Against Piston & Combustion Chamber Deposits, Rust, & Corrosion, Anti-Gel Properties Help Resist Gel Formation Due To Water Or Other Contamination, Special Base Stocks Used Resist Piston & Cylinder Wall Scuffing, Certified By The National Marine Manufacturer's Association.