Red Line MTL 75W80 GL-4 Synthetic Gear Oil - 1 Quart

Red Line MTL 75W80 GL-4 Synthetic Gear Oil - 1 Quart

The Ultimate Solution for Smooth Shifting and Cold-Weather Performance

Restore the joy of rowing through the gears with Red Line MTL. This 75W80 GL-4 gear oil is one of the most versatile manual transmission fluids on the market, serving as a direct performance upgrade for many BMW, Honda, Mini, and Rover gearboxes. Because it is formulated with polyol ester base stocks, it resists the thinning and shear-down that plague standard petroleum oils. Most importantly, its lack of reactive sulfurs makes it 100% safe for the "yellow metals" (brass, bronze, and copper) used in your transmission’s synchronizers, preventing long-term corrosion while ensuring crisp, clash-free engagement.

What’s Included in the Box:

- (1) 1 Quart (0.946L) Bottle: Standard neck design compatible with most common fluid transfer pumps.

The Red Line Advantage

- Optimized Synchronizer Grip: Balanced friction levels allow synchronizers to slow down and lock gears quickly, reducing shift effort and eliminating "grinding" during fast shifts.

- Safe for Yellow Metals: Unlike many GL-5 fluids, MTL contains no corrosive sulfur additives that can eat away at brass synchros over time.

- Superior Cold Flow: Provides significantly easier shifting in freezing temperatures compared to standard fluids, reducing drag and protecting internals from the moment you start the car.

- Ester-Based Durability: Offers exceptional film strength and high-temperature stability, ensuring your gears are protected even during heavy track use or high-heat environments.

- Reduced Internal Friction: Lowers operating temperatures and improves power delivery to the wheels by reducing "churning losses" within the gearbox.

Product Specifications

- Part Number: 50204

- Viscosity Grade: SAE 75W80

- Standard: API GL-4, GL-3, GL-1

- Viscosity at 100°C: 10.4 cSt

- Viscosity Index: 183

- Flash Point: 232°C / 450°F

- Pour Point: -50°C / -58°F

Primary Vehicle Compatibility

- BMW: MTF-LT-1, MTF-LT-2

- Honda / Acura: Manual Transmission Fluid (MTF)

- Mini Cooper: Models requiring 75W80 GL-4

- Toyota: Many models requiring 75W or 80W GL-4

- Mercedes-Benz: Specification 235.10

Precision Tip: MTL is a GL-4 rated fluid, specifically designed for manual transmissions and transaxles. It does not have the extreme-pressure additives required for most hypoid rear differentials (which usually require GL-5). If you are servicing a vehicle where the gearbox and differential share the same fluid (like some front-wheel-drive transaxles), verify that the manufacturer specifies a GL-4 fluid. For a complete service, most manual gearboxes require between 2 and 3 quarts.