Purpose and Specifications

LIQUI MOLY 25031 Marine Gear Oil GL4/GL5 80W-90 is a high-performance transmission oil in a convenient 250ml tube, perfect for manual shift transmissions in boats and vehicles. It delivers stable lubrication that cuts wear and noise, while providing top-notch corrosion protection even in harsh marine environments.

This SAE 80W-90 oil flows smoothly at cold starts down to -20°C and stays thick under high heat up to 150°C, ensuring reliable gear shifting and long-lasting protection. Special additives minimize friction for quieter operation and extend transmission life, meeting API GL4/GL5 and MT-1 standards.

When to Use / Replace?

Use this oil for manual transmissions, differentials, and marine gearboxes under heavy loads or saltwater exposure. Ideal for boats, high-performance vehicles, and systems needing GL4/GL5 compatibility.

• Replace every 40,000-60,000 km or 2-3 years for everyday use to prevent buildup and maintain smooth shifting.
• Change sooner every 20,000 km or yearly in severe conditions like towing, racing, or marine use.
• Shelf life: 5 years unopened in cool, dry storage.

FAQ

Is LIQUI MOLY 25031 safe for my boat's transmission?
Yes, it's specially formulated for marine manual transmissions, resisting corrosion from saltwater and reducing noise for smooth, reliable performance.

Can I use it in car gearboxes?
Absolutely, it works great in vehicle manual transmissions and hypoid differentials needing GL4/GL5 protection, especially under high loads.

How much oil for a full change?
The 250ml tube tops off most systems; check your manual for capacity, typically 1-3 liters total.