Mobil 1™ Synthetic Gear Lubricant 75W-90

Mobil 1™ Synthetic Gear Lubricant 75W-90

Mobil 1™ Syn Gear Lube LS is a superior performance, synthetic, multi-purpose, SAE 75W-90 automotive gear lubricant designed to help meet the highest level performance requirements of modern passenger vehicles in all types of operating conditions including limited slip applications, as well as, deliver outstanding power transfer performance. Compared to conventional hypoid gear lubricants, Mobil 1 Syn Gear Lube LS 75W-90 performs exceptionally over a wide range of temperatures. Mobil 1 Syn Gear Lube LS 75W-90 achieves this through a unique proprietary formulation, that deliver optimized viscosity-temperature properties together with the highest level of inherent formulation stability and helps to protect against thermal and oxidative degradation, wear and corrosion, viscosity loss associated with premature shearing. It also can be used in extended service and for aiding in fuel economy performance.


Features and Potential Benefits

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 -40°C 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:

FeaturesAdvantages and Potential Benefits
Exceptional thermal stability and resistance to high temperature oxidationHelps 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 scoringCapability to handle some of the severest driving conditions while delivering smooth efficient and reliable performance
Exceptional shear stabilityHelps to retain viscosity and film strength under severe operating conditions to prevent wear
Excellent rust, staining and corrosion protection of copper and its alloysHelps to reduce wear
Long component life
Enhanced frictional propertiesImproved fuel economy and reduced operating costs
Outstanding low temperature fluidity versus mineral oilsHelps to reduce wear at start up and ease of start-up even in arctic conditions
Good resistance to foamingHelps to maintain film strength for reliable lubrication
Compatible with typical automotive seals and gasketsHelps to minimize leakage and reduce contamination
Excellent limited-slip performanceHelps to reduce chatter and improve traction



  • Mobil 1 Syn Gear Lube LS 75W-90 is recommended by Imperial Oil 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

Specifications and Approvals

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


Typical Properties

Mobil 1 Syn Gear Lube LS 
SAE Grade75W-90
Viscosity (ASTM D445) 
cSt @ 40ºC103
cst @ 100ºC14.6
Viscosity Index146
Pour Point, ºC (ASTM D97)-39
Flash Point, ºC (ASTM D92)150
Density@15.6 ºC g/ml (ASTM D4052)0.859



The products described on this data sheet are manufactured from high quality petroleum base stocks, carefully blended with selected additives. As with all petroleum products, good personal hygiene and careful handling should always be practiced. Avoid prolonged contact to skin, splashing into the eyes, ingestion or vapour inhalation. Please refer to the Material Safety Data Sheet for further information.

Note: The products described on this data sheet are NOT controlled under Canadian WHMIS legislation.