Stop struggling with notchy shifting and give your manual transmission the protection it deserves. The Red Line 50504 MT-85 is a full-synthetic, ester-based gear oil engineered specifically for a superior manual shifting experience and long component life.

The MT-85 formula, rated 75W85 GL-4, provides the perfect coefficient of friction for brass synchronizers, preventing the damage that can be caused by the reactive sulfurs in most standard GL-5 oils. Experience quicker shifts, especially in cold weather, and eliminate gear noise.

Key Features and Benefits:

• Optimized for Manual Transmissions: Unlike slippery GL-5 differential oils, MT-85 has the perfect friction balance for smooth, proper synchronizer engagement.

• Superior Cold Shifting: Viscosity is consistent in all temperatures, helping to eliminate notchy shifting when the vehicle is cold.

• Safe for Brass Synchros: A non-corrosive, GL-4 formula ensures maximum synchronizer life.

• High-Performance Protection: Excellent film strength protects gears in high-stress and high-temperature conditions.

• Recommended Applications: Ideal for many popular manual transmission applications, including:

  • Nissan 350Z, 370Z, Maxima, Altima, and Sentra

  • Mitsubishi Evolution

  • Hyundai and Kia

  • NV4500 truck transmissions (Chevy Silverado, Dodge Ram)

  • Any application calling for GL-1, GL-3, GL-4, SAE 75W85, or SAE 5W30/SAE 30 motor oil.

Upgrade to Red Line MT-85 from Straight Six Imports today and feel the difference in your shift quality and drivetrain protection.