Purpose and Specifications

Shell Spirax S4 G 75W-80 is a premium manual transmission oil engineered for smooth gear shifts and long-lasting protection in vehicles meeting PSA standards. This GL-4 rated oil flows easily in cold starts down to -40°C for quick protection, while staying stable up to 150°C to shield gears from wear during heavy loads.

It excels in high-mileage gearboxes (over 300,000 km), reducing grind on synchros for easier downshifting. Approved for PSA B71 2315 specs, it's ideal for light trucks, cars, and vans needing reliable transmission performance.

• Key Benefits: Smoother shifting in cold weather, better synchro action in worn boxes, extended gear life under heat and load.
• Volume: 1 liter - perfect for top-ups or small fills.
• Shelf Life: Up to 5 years unopened in cool, dry storage.

When to Use / Replace?

Use Shell Spirax S4 G 75W-80 in manual transmissions requiring GL-4 or PSA B71 2315 oils, especially Peugeot, Citro&euacute;n, or similar PSA vehicles. Switch to it if you notice hard shifting, grinding noises, or for routine service in high-heat or stop-go driving.

Replace every 60,000-100,000 km or 3-4 years, or sooner if towing heavy loads or in extreme climates. Check fluid level monthly and top up as needed to maintain protection.

FAQ

Q: Will this oil fix grinding gears?
A: Yes, its thinner flow at operating temps improves synchro engagement in worn gearboxes over 300,000 km, often easing 3rd-to-2nd downshifts.

Q: Is it safe for cold winters?
A: Absolutely - the 75W rating ensures easy flow at -40°C, preventing stiff shifting on startup.

Q: How long does it last in the bottle?
A: Up to 5 years sealed, but use within 2 years of opening for best results.