Mobil Delvac™ 1 Transmission Fluid 40
Mobil commercial-vehicle-lube , Colombia
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:
| Features | 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 | 
Applications
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: | 
| EATON PS-386 | 
| Mack TO-A Plus | 
| Navistar, Inc. MPAPS B-6816 Type 2 | 
| Allison TES-439 | 
| Meritor O-81 | 
| This product meets or exceeds the requirements of: | 
| API MT-1 | 
Typical Properties
| Mobil Delvac 1 Transmission Fluid 40 | 
 | 
| SAE Grade | 40 | 
| Viscosity, ASTM D 445 | 
 | 
| cSt @ 40ºC | 95.1 | 
| cSt @ 100ºC | 14.8 | 
| Viscosity Index, ASTM D 2270 | 163 | 
| Pour Point, ºC, ASTM D 97 | -42 | 
| Flash Point, ºC, ASTM D 92 | 238 | 
| Density @ 15.6ºC g/ml, ASTM D 1298 | 0.825 | 
Health and Safety
Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @ http://www.msds.exxonmobil.com/psims/psims.aspx
All trademarks used herein are trademarks or registered trademarks of Exxon Mobil Corporation or one of its subsidiaries unless indicated otherwise.
08-2025