Red Line MT-90 | 75W90 GL-4 Gear Oil Full Synthetic - 1 Quart (946 ml)

Red Line MT-90 75W90 GL-4 Gear Oil is a premium, ester-base full synthetic lubricant custom-engineered for manual transmissions and transaxles requiring an API GL-4 fluid. Designed to optimize fluid friction characteristics, it delivers seamless shifting and rugged gear-teeth protection under high stress without threatening internal synchronizer components.

Product Specifications:

• Brand: Red Line Oil.

• Product Line: MT-90.

• Oil Type: Full Synthetic.

• Viscosity Grade (SAE): 75W90.

• Volume:  946 ml.

• Country of Origin: USA.

Product Benefits:

• Optimized Synchronizer Compatibility: Formulated with a balanced coefficient of friction to ensure immediate, proper synchronizer engagement; this successfully eliminates the "notchy" or stiff shifting often caused by overly slippery GL-5 alternatives.

• Absolute Safety for Soft Metals: Unlike standard GL-5 lubes, MT-90 is specifically engineered without reactive sulfurs, meaning it will not corrode, pit, or degrade brass or yellow metal synchronizers.

• Superior Thermal Performance: Maintains high film strength and unyielding gear defense at elevated operating temperatures, while remaining highly fluid in cold climates for effortless sub-zero shifting.

• Advanced Wear Mitigation: Provides outstanding boundary lubrication for gears and bearings, effectively extending transmission service life.

OEM Specifications & Recommendations:

• Formulated and highly recommended for applications requiring industrial GL-1, GL-3, and GL-4 metrics.

• Recognized as a popular premium choice for Nissan, Mazda, Toyota, VW/Audi, and Mitsubishi manual gearboxes.

Usage Instructions:

1. Elevate the vehicle on a flat surface and drain the old transmission fluid completely while warm to flush out contaminants.

2. Clean the magnetic drain plug thoroughly, reinstall, and tighten it to factory specification torque.

3. Refill the transmission with fresh Red Line MT-90 fluid through the appropriate fill plug until it reaches the correct level specified by your manual.

Suitable For:

• Manual transmissions, transaxles, and manual gearboxes in modern passenger cars and trucks requiring a dedicated SAE 75W90, API GL-4 lubricant.

Note:

• Always consult your vehicle's factory reference owner's manual to guarantee that the 75W90 viscosity grade and GL-4 specs exactly align before application.

Eliminate rough gear shifts and protect your transmission's brass internals with trusted American synthetic technology. Buy your authentic Red Line MT-90 Gear Oil today from Carboost Store!