Purpose and Specifications

Castrol Transmax 15F1E6 is a full synthetic gear oil in 75W-140 viscosity, perfect for protecting differentials and manual transmissions in demanding conditions. This 1-liter bottle delivers smooth gear shifts, superior wear protection for gears and bearings, and reliable performance from -40°C cold starts to over 150°C high-heat operation.

Approved for tough specs like MB 235.61 and ZF TE-ML standards, it handles heavy loads in trucks, SUVs, and performance cars without breaking down, keeping your drivetrain quiet and efficient for up to 100,000 km or 5 years under normal driving.

When to Use / Replace?

• Heavy towing or off-road: Swap every 50,000 km or 2 years to fight heat buildup and wear.
• Daily commuting: Change at 80,000-100,000 km or every 4-5 years per your owner's manual.
• High-mileage vehicles: Use if over 120,000 km to reduce noise and restore smooth operation.

Shelf life is 5 years unopened in cool, dry storage. Always check your vehicle manual for exact intervals.

Frequently Asked Questions

Is Castrol 15F1E6 suitable for limited-slip differentials?
Yes, it's designed as Limited Slip LL gear oil, providing excellent friction control for quiet, chatter-free performance in LSD setups.

Can I mix it with other gear oils?
Best to fully drain and refill with Castrol 15F1E6 alone for maximum protection—mixing can reduce effectiveness.

What temps does it handle?
Flows easily at -40°C for winter starts and stays thick up to 150°C+ under towing or racing loads.