Purpose and Specifications

Castrol Transmax Manual Transaxle 75W-90 (15F138) is a full synthetic transmission oil designed for manual transaxles and gearboxes. It delivers excellent wear protection and smooth shifting, especially in cold weather down to -30°C, while staying stable up to 150°C for reliable performance in daily driving.

This 1-liter bottle meets API GL-4+ and VW 501.50 specs, making it ideal for passenger cars like VW, Citroën, and others requiring enhanced extreme pressure protection. Its synthetic formula reduces operating temperatures, keeps components clean, and extends transmission life versus conventional oils.

When to Use / Replace?

• Use in manual transmissions calling for 75W-90 GL-4+ fluids, particularly VW-approved models, for smoother shifts and longer gear life.
• Replace every 60,000 km or 3 years under normal conditions; check sooner if towing or in severe heat/dust.
• Shelf life is 5 years unopened when stored cool and dry.

FAQ

Is this oil suitable for my VW Golf manual gearbox? Yes, it meets VW 501.50 approval for smooth shifting and wear protection in compatible models.

Can it handle cold winters? Absolutely, flows easily at low temps for quick protection and easy starts below freezing.

How often should I change it? Every 60,000 km or 3 years typically; consult your manual for exact intervals.