Sierra 10W-30 oil for Mercury Marine engine. Highly refined petroleum product formulated to meet or exceed the tough requirements of the 4-stroke motors. Reduces friction. Offers maximum corrosion protection. Reduces sludge to keep engine cleaner and more efficient. Low temperature viscosity offers better cold starting. Includes 216 gallon-size bottles of oil. Sierra Part #18-9420-3P.
OEM Part Number: