Product Description

Mobil Delvac 1 5W-40 is a fully synthetic high performance heavy duty diesel engine oil that helps towards long engine life while providing long drain capability for modern diesel engines operating in severe applications. Mobil Delvac 1 5W-40 delivers excellent performance in modern low emission engines, including refrigerated units, as well as older, well-maintained engines. Mobil Delvac 1 5W-40 is recommended for use in a wide range of heavy-duty applications and operating environments found in the on-road transport and off-road mining, construction, and agricultural industries. Mobil Delvac 1 also meets the requirements of the API SL specification for gasoline engines used in mixed fleets.

The excellent performance of Mobil Delvac 1 5W-40 is the result of extensive cooperative development work with major equipment builders and application of advanced lubrication technology. As a result, this product meets or exceeds the requirements of some of the latest API, ACEA, JASO, and Global industry specifications for diesel engine oils, as well as the requirements of many major American, European, and Japanese engine manufacturers.

Features and Benefits

Many modern, low emission diesel engines generate more soot and operate at higher temperatures than older engines. This significantly increases the need for high performance lubricants. Current tighter engine designs reduce oil consumption, resulting in less fresh oil makeup to replenish depleted additives. Top piston rings are located higher, bringing the oil film closer to the combustion chamber and exposing the lubricant to severe thermal stresses. Mobil Delvac 1 5W-40 maintains outstanding performance at high temperatures. It is also fully compatible with conventional oils. The key benefits include:

1 Relative to conventional 15W-40 engine oil. Actual fuel economy improvement is dependent on vehicle/equipment type, outside temperature, driving conditions and your current fluid viscosity

Features Advantages and Potential Benefits
Meets or exceeds demanding specifications of major OEMs One engine oil for mixed fleet operations
Outstanding thermal and oxidation stability Control of low temperature sludge build-up and high temperature deposits
Low volatility, excellent wear and bore polish control Good oil consumption control
Expertly formulated low viscosity formulation Fuel economy potential(1)
Exceptional low temperature pumpability Easier engine start-up and reduced wear
Good resistance to corrosion Helps towards long life of critical wear surfaces
Long drain capability Help towards operational efficiency andoverall cost control
Component compatibility Long gasket and seal life, extended service intervals


Mobil Delvac 1 5W-40 is recommended for use in super high performance diesel applications, including modern low emission engine designs with Exhaust Gas Recirculation (EGR). 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, European, and Japanese equipment builders

     •  Refrigeration units

Specifications and Approvals

This product has the following builder approvals:
Detroit Fluids Specification 93K214
MB-Approval 228.5
MB-Approval 235.28
This product is recommended by ExxonMobil for use in applications requiring:
Cummins CES 20072
Cummins CES 20071
This product meets or exceeds the requirements of:
Cummins CES 20078
Cummins CES 20077
Cummins CES 20076
Ford WSS-M2C171-D
Mack EO-N

Properties and Specifications

Grade SAE 5W-40
Ash, Sulfated, mass%, ASTM D874 1.35
Density @ 15 C, kg/l, ASTM D4052 0.854
Flash Point, Cleveland Open Cup, °C, ASTM D92 226
Kinematic Viscosity @ 100 C, mm2/s, ASTM D445 14.8
Kinematic Viscosity @ 40 C, mm2/s, ASTM D445 102
Pour Point, °C, ASTM D97 -45
Total Base Number, mgKOH/g, ASTM D2896 12
Viscosity Index, ASTM D2270 151

Health and safety

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


It cannot be guaranteed that the product information given above is up to date. For the latest version of the Product Data Sheet we refer to the product library of ExxonMobil.