Mobil 1 Syn Gear Lube LS 75W-90 combines wax-free synthesized hydrocarbon base oils and a specially designed extreme-pressure, limited-slip, sulfur-phosphorous additive system to help provide a significantly higher level of performance in rear axles and differentials versus conventional fluids. Great film strength at higher operating temperatures, reduced fluid friction and low-temperature application down to -50ºC helps to provide significant advantages versus conventional mineral oil formulations. It helps to reduce wear and spalling under the high speed, high torque and high horsepower conditions in competitive racing and high performance automobiles. This unique, high technology final drive gear lubricant has demonstrated outstanding performance including fuel economy, extended drain, long-term friction retention, low-temperature capability and improved differential/axle durability and cleanliness. Key features and potential benefits include:

Features Advantages and Potential Benefits
Exceptional thermal stability and resistance to high temperature oxidation Helps to extend gear and bearing life due to minimal deposits
Long seal life
Potential extended oil drain/service intervals
Outstanding protection against low speed/high torque wear and against high speed scoring Capability to handle some of the severest driving conditions while delivering smooth efficient and reliable performance
Exceptional shear stability Helps to retain viscosity and film strength under severe operating conditions to prevent wear
Excellent rust, staining and corrosion protection of copper and its alloys Helps to reduce wear
Long component life
Enhanced frictional properties Improved fuel economy and reduced operating costs
Outstanding low temperature fluidity versus mineral oils Helps to reduce wear at start up and ease of start up even in arctic conditions
Good resistance to foaming Helps to maintain film strength for reliable lubrication
Compatible with typical automotive seals and gaskets Helps to minimize leakage and reduce contamination
Excellent limited-slip performance Helps to reduce chatter and improve traction


  • Mobil 1 Syn Gear Lube LS 75W-90 is SUITABLE for use in modern high performance automobiles like SUV's, Vans and Light duty trucks requiring API GL-5 level performance
  • Mobil 1 Syn gear Lube LS 75W-90 is intended for initial fill, topping-off or refilling differentials, final drives, transfer cases and other gear applications where lubricants meeting API Service GL-5 and multi-purpose or mild EP gear lubricants are recommended
  • Not recommended for automatic, manual or semiautomatic transmissions for which engine oil or automatic transmission fluids are recommended
  • Where extended service intervals and warranties are required


Mobil 1 Syn Gear Lube LS meets or exceeds the requirements of: 75W-90

Typical Properties

Mobil 1 Syn Gear Lube LS
SAE Grade 75W-90
Viscosity (ASTM D445)
cSt @ 40ºC 103
cst @ 100ºC 14.6
Viscosity Index 146
Pour Point, ºC (ASTM D97) -39
Flash Point, ºC (ASTM D92) 150
Density@15.6 ºC g/ml (ASTM D4052) 0.859


There are no reviews for this item. Write Review


Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 1 question Browse 1 question and 1 answer
Why did you choose this?
The Lubricant Store Store
Spec oil for Manitowoc MLC100-1 crane hoist gear case
Richard C on Oct 2, 2019
Spec oil for Manitowoc MLC100-1 crane hoist gear case
Richard C on Oct 2, 2019