Treat your RV generator engines with the quality Cummins OnaMax 15W40 oil. The factory tested oil provides maximum protection for your engine plus it's formulated to reduce consumption and engine wear due to high temperature oil oxidation and viscosity increase.

Provides conventional motor oils with anti-wear additives like zinc and phosphorus (ZDDP) necessary to protect against camshaft and valvetrain damage on break-inAllow pistons rings to seat properly with less-slick oil while anti-wear additives protect other engines components to avoid excessive wear...

Brand new, genuine Mercury Marine/Mercruiser Oil 4Cyl Gl@3. This is a factory original equipment part, not aftermarket.

Brand new, genuine Mercury Marine/Mercruiser Oil-4 Cycle @6. This is a factory original equipment part, not aftermarket.

25W40 Synthetic Blend Engine Oil 5 Quart (4.7 L) 4/Case This 4 cycle oil is blended with premium grade synthetic and mineral based stock combined with superior designed additives formulated for the stress endured by sterndrive and inboard engines. Superior corrosion protection Advanced lubrication f...

Motor oil is made from crude oil and is used to lubricate, clean, and cool engines. Types of motor oil include conventional, synthetic, diesel, bio-based, hybrid (blends of conventional and synthetic), and recycled oils. Motor oil varies in weight and viscosity, as well as additives that some manufa...