Mobil 1 Syn Gear Lube LS 75W-140 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. Greater film strength at higher operating temperatures, reduced fluid friction and 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 many sport utility vehicles, vans, light trucks, and cars. This unique, high technology final drive gear lubricant has demonstrated outstanding performance including long-term friction retention, excellent viscosity stability 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 retains 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
Longer component life
Enhanced frictional properties Helps to improved fuel economy and reduce 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-140 is recommended for use in modern high performance vehicles like sport utility vehicles, vans and light duty trucks requiring API GL-5 performance that require excellent durability
  • Mobil 1 Syn Gear Lube LS 75W-140 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
  • Mobil 1 Syn Gear Lube LS 75W-140 can also be used in rear axles where API Service GL-4 lubricant is recommended
  • Not recommended for automatic, manual or semiautomatic transmissions for which engine oil or automatic transmission fluids are recommended
  • Recommended for many limited slip applications. For certain high level LS applications, additional limited slip additive may be required if axle chatter is observed.


Mobil 1 Syn Gear Lube LS meets or exceeds the requirements of the following industry specifications: 75W-140

Typical Properties

Mobil 1 Syn Gear Lube LS
SAE Grade 75W-140
VViscosity (ASTM D445)
cSt @ 40ºC 170
cst @ 100ºC 24.4
Viscosity Index 175
Pour Point, ºC (ASTM D97) -48
Flash Point, ºC (ASTM D92) 207
Density@15.6 ºC g/ml (ASTM D4052) 0.872


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
No questions have been asked about this item. Be the first!