Ultimate Differential Protection: Red Line 75W90 GL-5 Gear Oil (Part #57904)

Maximize the efficiency and lifespan of your differential with Red Line 75W90 GL-5 Synthetic Gear Oil (Part #57904), the industry standard for high-performance rear-ends. Available at Straight Six Imports, this is the most popular gear oil in the Red Line lineup, trusted by racers and enthusiasts worldwide.

This full-synthetic, polyol ester-based formula is engineered to handle the extreme sliding friction, heat, and pressure found in modern hypoid gears and high-torque differentials. It's the essential fluid for vehicles running a performance differential, including JDM LSD-equipped cars like the Nissan GT-R, Subaru WRX STI, Mitsubishi Evo, and BMW M-series.

Key Features for Maximum Drivetrain Performance:

• Integrated Friction Modifiers: Contains additional friction modifiers, making it fully suitable for clutch-type Limited Slip Differentials (LSDs). This ensures proper lock-up and eliminates LSD "chatter" without the need for separate additives.

• Extreme Pressure (EP) Protection: Exceeds GL-5 specifications, providing unmatched protection for hypoid gears against extreme pressure and wear in racing and street applications.

• Reduces Operating Temperatures: The ester base stocks dramatically improve heat transfer, helping to lower differential temperatures by 10F to 70F for longer component life and sustained performance.

• Superior Viscosity Stability: The high Viscosity Index (VI) maintains a constant film thickness across a wide temperature range, ensuring robust protection from cold Canadian winters to blistering track days.

Protect your axles, crown gears, and pinion with the best. Upgrade to Red Line 75W90 GL-5 (57904) and drive with confidence.