Lubex MasterGear LS90 Gear Oil

  • Limited slip differential performance
  • Superior gear oil
  • Promote long component life


The Lubex MasterGear LS90 is a high performance, extreme pressure (EP), automotive gear oil specifically designed for limited slip rear drive differentials, particularly those with the “cone clutch” design. It also has special friction properties to provide a smooth, noise-free operation with long gear life.

Recommended for the majority of limited slip hypoid differentials, both plate and cone clutch in rear wheel drive cars, 4WD vehicles and light trucks under all operating conditions.

Additional information


1000Ltr, 205Ltr, 20Ltr, 5Ltr, 60Ltr

Features & Benefits

  • Quiet shudder-free operation.
  • Special friction modifier system provides excellent lubricity characteristics for smooth non-stick/ engagement.
  • Long gear life as the EP additives control tooth wear even under high torque and shock loading conditions.
  • Rust and corrosive additives prevent damage otherwise caused by moisture formation, formed from condensation or by contamination ingress.
  • Extends the copper component life as the corrosion inhibition and thermal stability limits the corrosion of bearings and bushes containing copper.


  • API GL5+
  • Ford FM2C-1006A/B, M2C-105A, M2C-104A
  • GM HN 1561, HN 1187, HN 1386
  • BTR 5M-31 (SAE90), 5M-41 (SAE 90)
  • U.S Military MIL-L-2105B