Yamalube 10W-40 Marine 4T Engine Oil (Yamaha 4-Stroke)

As a leading manufacturer of outboard engines, Yamaha created the Yamalube line of oils to ensure the best possible care for their motors. Yamalube 10W-40 Marine 4T is the embodiment of that commitment – an oil developed, tested, and approved by Yamaha itself specifically for marine use. It’s designed to handle the unique challenges faced by 4-stroke boat engines: sustained high RPM operation, exposure to saltwater, frequent low-speed trolling, and extended periods of disuse. Its formula guards against the corrosive effects of salt air, neutralizes acids from any condensation, and keeps the engine’s internals clean – which translates into reliable power and long engine life.

• Engineered by Yamaha: This oil was developed in-house at Yamaha Motor Marine and tested in real-world conditions on Yamaha boats and WaveRunners. The result is a product that perfectly matches the needs of every Yamaha engine – from small portable outboards to powerful V6 models. By using Yamalube, you’re giving your engine exactly what Yamaha’s engineers intended for it.
• Comprehensive Protection: In a marine environment, engines are exposed to humidity and salt which can cause corrosion. Yamalube 10W-40 contains special corrosion inhibitors to protect internal parts even when the engine is off and drawing in moist air. Additionally, its additives neutralize acids formed from any condensation or incomplete combustion, protecting bearings and other sensitive components.
• Maintains Peak Efficiency: Thanks to its enhanced detergent and dispersant additives, the oil prevents the build-up of carbon and micro-particles. This means the engine retains optimal compression and fuel efficiency. With regular use of Yamalube, the need for decarbonizing and internal engine cleaning is greatly reduced.
• Smooth & Quiet Operation: Yamaha customers often note quieter and smoother engine performance with Yamalube. The oil provides a stable lubricating film that reduces vibration and noise, especially noticeable at idle or during sudden acceleration. It also protects the gearbox gears and valvetrain components, which is key to maintaining quiet operation.
• Warranty Confidence: Using genuine Yamalube oil ensures you are following the manufacturer’s recommendations, which is important for preserving factory warranty coverage. Even beyond the warranty period, trusting Yamalube means you’re giving your engine proven quality. This oil is not just formulated to meet specifications – it’s designed to optimize your Yamaha engine’s performance and safeguard it for years to come.