Mobil Delvac 1 Transmission Fluid 40 delivers exceptional performance in today's manual transmissions. The key benefits include:


Advantages and Potential Benefits

Excellent load carrying and anti-wear performance

Extends transmission life and reduces cost of operation

Outstanding protection against deposit formation

Longer seal life, extended drain and service intervals

Maximum protection from corrosion of copper and its alloys

Protects and extends the life of synchronizers

Optimized thermal and oxidation protection

Extends component life and improves efficiency

Exceptional shear stability

Minimizes wear during severe operation

Outstanding low-temperature fluidity

Reduces wear during cold temperatures and improves shifting with quicker starts

Extended drain and service interval capability

Provides lower operating costs and higher productivity

Improved friction reduction properties

Helps improve fuel economy and lowers operating costs


      Recommended by ExxonMobil for use in:

  • Heavy-duty manual transmissions where extended service intervals and warranties are required
  • Commercial line haul, vocational, off-road, pick-up and delivery, and bus applications
  • Use as a companion with Mobil Delvac 1 Gear Oils in rear axles for maximum component life, service efficiency, and fuel economy improvement
  • NOT suitable for hypoid gear applications in differentials and final drives, either for topping-off or refills, where API service GL-5, MIL-PRF-2105E, or SAE J2360 lubricants are specified 


    Mobil Delvac 1 Transmission Fluid 40 meets or exceeds the requirements of the following industry and builder specifications:


    API MT-1



    Mobil Delvac 1 Transmission Fluid 40 has the following builder approvals:


    Eaton PS-386


    Mack TO-A PLUS X

    Navistar MPAPS B-6816 Type 2


    Typical Properties

    Mobil Delvac 1 Transmission Fluid 40


    SAE Grade


    Viscosity, ASTM D 445


    cSt @ 40ºC


    cSt @ 100ºC


    Viscosity Index, ASTM D 2270


    Pour Point, ºC, ASTM D 97


    Flash Point, ºC, ASTM D 92


    Density @ 15.6ºC g/ml, ASTM D 1298



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