Purpose and Specifications

LIQUI MOLY 25037 Marine Fully Synthetic Gear Oil is a top-tier 75W-90 transmission fluid designed for marine gearboxes and high-stress gear systems. This fully synthetic formula delivers extreme protection under tough conditions, flowing smoothly at cold starts down to -40°C and staying thick at high temps up to 150°C for flawless gear shifts and long component life.

It meets API GL4/5 and MT-1 standards, plus ZF approvals like TE-ML 02B, 05A, 12L, 12N, 16F, 17B, 19C, 21A, ensuring perfect compatibility with marine transmissions, sterndrives, and reverse gears. The 250ml tube makes precise top-ups easy without waste.

• Key Benefits: Cuts wear by reducing friction, quiets noisy gears, resists breakdown for smooth operation, and protects seals from leaks and corrosion.
• Ideal for boats facing saltwater, heat, and heavy loads.

When to Use / Replace?

Use this oil in marine transmissions requiring GL4/GL5 specs during routine service or repairs. Replace every 50,000 km or 2 years on land vehicles, or per boat manufacturer intervals (often annually for marine use) to maintain peak performance and avoid costly damage. Shelf life is 5 years unopened when stored cool and dry.

FAQ

Q: Is this safe for my boat's ZF transmission?
A: Yes, it carries full ZF TE-ML approvals (02B to 21A), providing reliable lubrication for marine ZF units under extreme loads.

Q: How does 75W-90 perform in cold weather?
A: The '75W' flows easily at low temps like -40°C for quick protection on chilly mornings, while '90' holds up to 150°C heat.

Q: Can I use it in non-marine cars?
A: Absolutely, it's great for manual transmissions matching GL4/5 specs, extending gear life with superior wear protection.