Purpose and Specifications

Castrol Syntrax LS 75W-140 1L is a full synthetic transmission oil designed for axles, final drives, and limited slip differentials in passenger cars, commercial vehicles, and high-performance models like BMW M Series, Mercedes AMG, and Nissan GTR. Its API GL-4/GL-5 specs ensure top protection under heavy loads.

This oil flows smoothly at cold starts down to -40°C, reducing wear and boosting efficiency, while staying stable up to 220-230°C to prevent overheating damage. It cuts noise and vibrations, extends component life, and supports longer drain intervals up to 100,000 km or 24 months in heavy use.

• Reduces torque loss for better fuel efficiency
• Excellent anti-wear protection at all temperatures
• Prevents pitting and shear breakdown for reliable performance
• Shelf life: 5 years unopened in cool, dry storage

When to Use / Replace?

Use in limited slip differentials, hypoid gears, and heavy-duty axles requiring 75W-140 viscosity. Ideal for towing, racing, or extreme conditions where standard oils fail.

Replace every 60,000-100,000 km or 12-24 months, or sooner if you notice gear noise, slipping, or fluid darkening. Check levels monthly in high-load vehicles.

FAQ

Is this safe for my limited slip differential? Yes, it's specially formulated to eliminate chatter and vibrations in LSDs while providing GL-5 extreme pressure protection.

Can I use it in cold climates? Absolutely, it pumps easily at -40°C for quick protection on startup without thickening.

How long does it last compared to regular oil? Expect double the service life with extended drains up to 100,000 km thanks to superior thermal stability.