Redline Oils

Redline MTL 75W-80 GL-4 Gear Oil - 1Qt

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  • Regular price $35.05

Appropriate coefficient of friction for most manual transmission synchronizers (other's synthetic gear oils are often too slippery for proper synchro engagement). Excellent gear and synchro protection, balanced slipperiness for easier shifting in cold climates. Excellent for high- and low-mile transmissions. Compatible with petroleums and other synthetics

  • Safe for brass synchros, as it lacks the reactive sulfurs found in most GL-5 oils that cause damage
  • Offers quicker shifts, perfect synchronizer coefficient of friction
  • Eliminates notchy shifting, even when cold
  • High performance gear protection and longer synchro life
  • Satisfies the gear oil viscosity requirements of 75W, 80W, and motor oil viscosities of SAE 30, 10W30, and 5W30
  • Recommended for GL-1, GL-3, and GL-4 applications as well as where most special synchromesh fluids are specified


  • API Service Class: GL 4
  • Viscosity Grade: SAE 75w80
  • Vis @ 100 degrees C: cSt 105.4
  • Vis @ 40 degrees C: cSt 54.1
  • Viscosity Index: 185
  • Pour Point, degrees C: -50
  • Pour Point, degrees F: -58