Mobil 1™ Syn Gear Lube LS 75W-140  

Mobil Passenger Vehicle Lube, United States

High Performance Synthetic Multi-Purpose Automotive Gear Lubricant

Product Description

Mobil 1™ Syn Gear Lube LS 75W-140 is a high performance, synthetic, multi-purpose, automotive gear lubricant designed to help meet the highest level performance requirements of many modern passenger vehicles in all types of operating conditions, from mild to severe, 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-140 performs exceptionally over a wide range of temperatures. Mobil 1 Syn Gear Lube LS 75W-140 achieves this through a unique proprietary combination of synthetic baseoils and a precisely balanced additive system that helps to deliver optimized viscosity-temperature properties together with the highest level of inherent formulation stability.  It also helps to protect against thermal and oxidative degradation, wear and corrosion, viscosity loss associated with premature shearing.


Features and Potential Benefits

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:

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 retains 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
Longer component life
Enhanced frictional propertiesHelps to improved fuel economy and reduce 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-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.


Specifications and Approvals

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 Grade75W-140
VViscosity (ASTM D445) 
cSt @ 40ºC170
cst @ 100ºC24.4
Viscosity Index175
Pour Point, ºC (ASTM D97)-48
Flash Point, ºC (ASTM D92)207
Density@15.6 ºC g/ml (ASTM D4052)0.872


Health and Safety

Based on available information, this product is not expected to produce adverse effects on health when used for the intended application and the recommendations provided in the Material Safety Data Sheet (MSDS) are followed. MSDS's are available upon request through your sales contract office, or via the Internet. This product should not be used for purposes other than its intended use. If disposing of used product, take care to protect the environment.

Mobil , Mobil 1 and the Pegasus design are trademarks of Exxon Mobil Corporation, or one of its subsidiaries.

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Typical Properties are typical of those obtained with normal production tolerance and do not constitute a specification. Variations that do not affect product performance are to be expected during normal manufacture and at different blending locations. The information contained herein is subject to change without notice. All products may not be available locally. For more information, contact your local ExxonMobil contact or visit
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