Purpose and Specifications

COMMA EP80W90 GL4 5L is a high-quality mineral gear oil designed for manual transmissions, gearboxes, differentials, and hypoid axles. It meets API GL-4 and GL-3 standards, plus Ford SQM-2C 9008-A and MB 235.1 specs, making it safe for classic vehicles with brass, bronze, and synchronizer components without causing staining or damage.

This oil flows smoothly at low temperatures down to -30°C for easy cold starts and stays thick under high heat up to 200°C, protecting gears from wear during heavy loads. The 5-liter pack is perfect for complete transmission flushes, offering extreme pressure additives that reduce friction and extend gear life.

• Key Benefits: Prevents rust and corrosion for longer part life, handles high temps without breaking down, compatible with manual gearboxes, transaxles, and rear axles.
• Shelf Life: 5 years from manufacture date (check bottle code YYYY.MM.DD).

When to Use / Replace?

Use in older cars, trucks, and classics specifying 80W-90 GL-4 oil, especially with overdrive gearboxes or non-hypoid axles. Replace every 50,000-80,000 km or 3-4 years under normal driving, or sooner (30,000 km) for towing, off-road, or severe conditions to avoid gear noise and slipping.

Ideal for operating temps from -30°C to 200°C; check fluid level monthly and inspect for dark color or burnt smell signaling replacement time.

FAQ

Q: Is this safe for my classic car's synchros?
A: Yes, GL-4 formula provides the right friction for smooth shifting without damaging brass or bronze parts.

Q: How often should I change it?
A: Every 50,000 km or 3 years for daily drivers; more frequently for heavy use to keep gears quiet and protected.

Q: Will it work in hypoid differentials?
A: Absolutely, it's built for hypoid, spiral bevel, and double reduction axles with extreme pressure protection.