Mobil Delvac 1 ESP 5W40 (5 Gal. Pail)
Mobil Delvac 1 ESP 5W40 is the premium high performance diesel engine oil in the Mobil line-up. Delvac 1 ESP is a full synthetic diesel engine oil designed for long service, ultimate friction and wear control, and has the ability to provide improved fuel economy. Mobil Delvac 1 ESP is especially engineered for modern low emission diesel engines especially those designed to operate with SCR technology utilizing Diesel Exhaust Fluid.

Mobil Delvac 1 ESP 5W-40 maintains outstanding performance at significantly higher temperatures than other high performance diesel engine oils. It also delivers exceptional low temperature fluidity and pumpability at low temperatures for smooth starting in cold down to -35°C.
Mobil Delvac 1 ESP 5W-40 is formulated with advanced synthetic basestocks to help improve fuel economy1.
Features |
Advantages and Potential Benefits |
Meets or exceeds demanding specifications of major OEMs |
One engine oil for mixed diesel fleet operations |
Outstanding thermal and oxidation stability |
Reduced low temperature sludge build-up and high temperature deposits |
Enhanced film strength at high temperatures |
Reduced engine scuffing and bore polishing |
Inherent stay-in-grade shear stability |
Wear protection and reduced oil consumption; maintains viscosity in severe, high temperature service |
Advanced formulation and viscometrics |
Improved fuel economy |
Low volatility |
Reduced oil consumption |
Exceptional low temperature pumpability |
Easy engine start-up and reduced wear |
Enhanced TBN quality reserve |
Deposit control and extended drain capability |
Outstanding resistance to corrosion |
Extended life of critical wear surfaces |
Long drain capability |
Increased operating efficiency and lower overall cost |
Component compatibility |
Long gasket and seal life, extended service intervals |
Low ash formulation meeting API CK-4 and CJ-4 requirements |
Long emissions aftertreatment (DPF, DOC and SCR) life |
1Compared to an SAE 15W-40 engine oil. Actual savings are dependent on vehicle engine type, outside temperature, driving conditions, and your current engine oil viscosity.
Mobil Delvac 1 ESP 5W-40 is recommended for use in all super high performance diesel applications, including modern low emission engine designs with Exhaust Gas Recirculation (EGR), Aftertreatment systems with Diesel Particulate Filters (DPF’s) and Diesel Oxidation Catalysts (DOC’s). These applications include the following:
- On-highway engines operating in both high speed/high load and stop-and-go conditions
- Off-highway engines operating in severe low speed/heavy load conditions
- Virtually all diesel powered equipment from American and European equipment builders
- High performance gasoline engines and mixed fleets
- Refrigeration units
Mobil Delvac 1 ESP meets or Exceeds the requirements of: | 5W-40 |
API CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4 | X |
ACEA E9, E7 | X |
Caterpillar ECF-3 | X |
Cummins CES 20081 | X |
Mobil Delvac 1 ESP is approved by the following OEMs: | 5W-40 |
Detroit Fluids Specification 93K218 | X |
Mack EO-O Premium Plus | X |
MAN M 3575 | X |
MB-Approval 228.31 | X |
MTU Oil Category 2.1 | X |
Volvo VDS-4 | X |
Mobil Delvac 1 ESP | |
SAE Grade | 5W-40 |
Viscosity, ASTM D 445 | |
cSt @ 40ºC | 81.1 |
cSt @ 100ºC | 13.56 |
Viscosity Index, ASTM D 2270 | 170 |
Density @ 15.6ºC kg/L, ASTM D 4052 | 0.857 |
Pour Point, ºC, ASTM D 97 | -33 |
Flash Point, ºC, ASTM D 92 | 222 |
Sulfated Ash, wt%, ASTM D 874 | 1 |
Total Base Number, mg KOH/g, ASTM D 2896 | 12.1 |
CCS, cP, ASTM D 5293 | 6330 @ -30C |
MRV, cP, ASTM D 4684 | 22000 @-35C |
HTHS @ 150ºC, cP, ASTM D4683 | 3.7 |