LIQUI MOLY – LIQUI MOLY Marine & PWC Oils - 0.2-1 L, including Marine 4T Motor Oil in SAE 10W30, 10W40, 25W40 and 25W50, Marine PWC Motor Oil SAE 10W40, Marine Super Diesel Additive, Marine Gasoline System Cleaner, and Marine Winch Grease. Marine engines and personal watercraft run under conditions no road engine sees: near-constant high load, no coasting, a humid intake charge and long periods sitting between outings. Water and condensation in the crankcase are the real enemies here, and marine-specific chemistry is what handles them. These single-fill sizes, from 500mL cans up to 1L bottles, suit a PWC oil change, a topping-off kit stowed on board or a season-opening service. Marine PWC Motor Oil SAE 10W40 is blended for the high-rpm four-stroke ski engines that make their power near redline, holding film strength as intake and oil temperatures climb. The Marine 4T grades in 10W30, 10W40, 25W40 and 25W50 cover outboards and sterndrives across climates and duty cycles, with strong anti-corrosion protection for storage. Keeping the correct grade aboard means an unexpected top-up on the water never turns into a compromise made at the nearest dock with whatever is on the shelf.