Mobiltrans™ AST 30

Mobil commercial-vehicle-lube , Kazakhstan

Extra High Performance Drivetrain Lubricant

Product Description

Mobiltrans™ AST (All Season Transmission) is an extra high performance drivetrain lubricant engineered to meet the extreme performance requirements in heavy-duty off-highway transmissions, drive trains, and hydraulic systems. Mobiltrans AST 30 lubricant combines selected high quality base oils and an advanced additive system to deliver the precise performance parameters needed to help maximize the productivity of construction, logging, mining and agriculture equipment operating in severe conditions.


Features and Benefits

Today's technology has vastly improved the performance capabilities of heavy-duty off-highway equipment in terms of load, speed, control, and performance through innovative drivetrain designs. These designs have increased the requirements of drivetrain fluids to deliver higher performance, increased productivity, and reduced operating costs. For heavy-duty transmissions, friction control, wear protection, thermal stability, shear stability, rust and corrosion protection, and seal compatibility are features that must be optimally balanced to provide extended gear and synchroniser life, smooth shift control, fuel economy, and high load capability over a wide range of applications. Mobiltrans™ AST delivers exceptional performance in today's power train components including haul truck final drives with year-round application. The key benefits include:



Advantages and Potential Benefits

Excellent frictional properties

Optimum clutch friction retention and slippage control, excellent anti-chatter brake performance, and extended clutch/brake life

Excellent load carrying, anti-wear, and EP performance

Great wear protection, extended component life, and reduced cost of operation

Outstanding protection against deposit formation

Help extend seal life, drain & service intervals

Maximum protection from corrosion of copper and its alloys

Protects and extends the life of synchronizers

Optimized thermal and oxidation protection

Extended transmissions and drive train life

Exceptional shear stability

Maintains effective viscosity and film strength during severe operation

Outstanding low-temperature fluidity and pumpability

Smoother shifting with quicker starts and reduced wear

All-season capability

Extended drain and service intervals with lower operating costs and higher productivity



Mobiltrans AST 30 is recommended for use in heavy-duty transmissions, gear boxes, differentials, final drives, wet brakes and hydraulic systems.

Mobiltrans AST 30 is suitable for use in equipment requiring Caterpillar TO-4 and TO-4M fluids and Komatsu equipment, requiring good micro-clutch performance.

Properties and Specifications




SAE 5W-30

Brookfield Viscosity @ -35 C, mPa.s, ASTM D2983


Density @ 15.6 C, g/ml, ASTM D4052


Flash Point, Cleveland Open Cup, °C, ASTM D92


Kinematic Viscosity @ 100 C, mm2/s, ASTM D445


Kinematic Viscosity @ 40 C, mm2/s, ASTM D445


Pour Point, °C, ASTM D97


Viscosity Index, ASTM D2270



Health and safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @

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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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