Mobil Delvac™ 1 Transmission Fluid 40

Mobil commercial-vehicle-lube , New Caledonia

Supreme Performance Transmission Lubricant

Product Description

Mobil Delvac™ 1 Transmission Fluid 40 is a fully synthetic, manual transmission lubricant approved by Eaton against the PS-386 specification and engineered to meet the most demanding extended drain and OEM warranty requirements. It is recommended for year-round lubrication of manual transmissions in light to severe duty on- and off-highway equipment operating in a wide range of environments. Designed to provide maximum protection and extended operating life to heavy duty transmissions, Mobil Delvac 1 Transmission Fluid 40 provides outstanding high-temperature performance, oxidation stability, wear protection, and corrosion control.

Outstanding performance is confirmed by approval for heavy-duty transmissions covered by Eaton Roadranger and Extended Warranties of 750,000 miles, with oil drains of 500,000 miles. It is also approved against the Mack TO-A Plus 500,000 mile extended service classification for Mack T300 series manual transmissions. Mobil Delvac 1 Transmission Fluid 40 meets or exceeds the requirements of the API service MT-1 classification and is recommended by ExxonMobil for use in transmissions and gear cases where API Service GL-1 through GL-4 (non-EP) gear protection is required.


Features and Benefits

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 


Specifications and Approvals

This product has the following approvals:


Mack TO-A Plus

Navistar, Inc. MPAPS B-6816 Type 2

Allison TES-439 


This product meets or exceeds the requirements of:



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



Health and Safety

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

All trademarks used herein are trademarks or registered trademarks of Exxon Mobil Corporation or one of its subsidiaries unless indicated otherwise.