Yamaha Yamalube 4-Stroke Oil

Marine oil is vastly different than automotive oil. Automotive engines are not designed and built to run at 6000 rpm all day long, so the oil is not formulated to protect at this extreme level.

Additionally, automotive engine oil specifications have an entirely different agenda due to regulations, mandates and warranty items they must target. Marine oil is formulated and designed for the harshest saltwater environment. Automotive oils don’t operate in the constantly corrosive environment that boats do, so marine oils have much higher levels of anti-corrosive additives in them. These differences are certified to a minimum industry standard by the NMMA using the “FC-W” label. An excellent example is Yamalube 4-M. It’s formulated to provide specific protection that automotive oils (and even many marine oils) don’t, by using a proprietary formula of anti-wear additives, anti-corrosion inhibitors, shear-stability polymers and anti-foaming agents (for proper protection in sustained high-rpm operation), as well as detergents, dispersants and viscosity index improvers that meet or exceed the FC-W specification. Yamalube 4-M is specifically formulated for the precise operational characteristics a four-stroke outboard can endure, including the possibility of oil dilution, which can sometimes occur (i.e., when gasoline from the combustion chamber leaks by worn piston rings and gets into the oil crankcase). Yamalube 4-M is a very special, purpose-built oil specifically made for four-stroke outboards that operate in the harsh marine environment. Four-stroke engines are lubricated by oil held in an oil sump. The oil is distributed through the engine by splash lubrication or a pressurized lubrication pump system; these systems may be used alone or together. In the US, a company called CITGO makes Yamalube on behalf of Yamaha USA. Yamalube 2M TC-W3® Yamaha-formulated and NMMA®-approved, it provides outstanding protection for two-stroke, water-cooled outboards, with its special blend of additives that help combat ring stick, corrosion, varnish and wear. Yamaha requires you to run their oil only, then by law they must furnish you oil. Your warranty can't be voided as long as the oil is TCW-3 approved. Those 2 things will stand up in a court of law. #1 if Yamaha requires you to run their oil only, then by law they must furnish you oil. Yamalube is the ONLY oil “built around” the unique demands, operating characteristics and applications of Yamaha engines. Collaborating with Yamaha engine designers, our global oil engineers formulate each Yamalube oil from scratch, to be engine/application-specific and to meet/exceed industry standards like JASO MA. 4-stroke and small engine oil are the same, unless you are referring to the 2-stroke oil that is usually added to the gasoline, like small snow blowers and weed wackers. Marine engine oils have to handle high rpm and constant loads experienced by marine engines. ... A marine engine oil has to resist shear, moisture, and corrosion more than an automotive engine oil, and has to have extremely strong film strength to protect engine parts under constant stress and load. Your Yamaha outboard is vastly different from your automotive engine; so avoid regular automotive engine oils. Use a motor oil specifically formulated for the rigors of the marine environment, like Yamalube 4M for four-stroke outboards, and Yamalube 2M for two-stroke outboards.

Yamaha Marine Yamalube 4-Stroke Oil was designed to handle high RPM and constant loads experienced by marine engines and to resist shear, moisture, and corrosion.