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.