Bel-Ray Marine Semi

Bel-Ray Marine Semi-Synthetic Gear Oil Protect your marine drivetrain with Bel-Ray Marine Semi , a high-performance semi-synthetic gear oil engineered for harsh on-water conditions. Designed for superior gear protection, this GL-5 rated formula delivers reliable performance for outboards, stern drives, and inboard marine gear sets. High-performance synthetic blend: Reduces wear, friction, and heat for smoother operation and extended component life. Marine-specific engineering: Formulated to resist moisture, foaming, and corrosion common in marine environments. GL-5 extreme-pressure protection: Safeguards gears and bearings under heavy loads and shock loads. OEM compliant: Exceeds requirements of major marine engine manufacturers for dependable compatibility. Eco-conscious formula: Made without hazardous chemicals that could harm marine ecosystems. Whether cruising or towing, Bel-Ray Marine Semi helps maintain optimal gear performance and longevity. Choose a trusted marine gear oil that stands up to salt, humidity, and high torque demands—so you can focus on the water, not the workshop.