Mobil 1™ Turbo Diesel Truck 5W-40

Full Synthetic Performance Heavy Duty Diesel Motor Oil

Mobil 1™ Turbo Diesel Truck 5W-40 is a full synthetic performance heavy duty diesel motor oil that helps to extend engine life while providing long drain capability and potential fuel economy benefits* for modern diesel engines operating in severe applications. Mobil 1 Turbo Diesel Truck utilizes state-of-the-art technology to help deliver exceptional performance in modern low emission engines, including refrigerated units, as well as older, well-maintained engines. Mobil 1 Turbo Diesel Truck 5W-40 is recommended for use in a wide range of light-duty applications such as turbo diesel pick-up trucks, as well as, heavy-duty applications and operating environments found in the on-road transport and off-road mining, construction, and agricultural industries.  Mobil 1 Turbo Diesel Truck is suitable for use in gasoline engines used in mixed fleets.


 The performance of Mobil 1 Turbo Diesel Truck 5W-40 is the result of extensive cooperative development work with major equipment builders and application of the latest lubrication technology.


*Compared to a 15W-40 conventional engine oil. Actual savings are dependent upon vehicle/engine type, outside temperature, driving conditions, and your current engine oil viscosity.


Equipment lubricant recommendations

Our Mobil Serv℠ Product Selector tool will help you identify lubricant(s) for your specific equipment.

Data sheets

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 supreme 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 1 Turbo Diesel Truck 5W-40 helps to maintain outstanding performance at significantly higher temperatures than other high performance diesel engine oils. It is also fully compatible with conventional oils. The key potential benefits include:



Advantages and Potential Benefits

Meets or exceeds demanding specifications of a major OEM

One engine oil for mixed fleet operations

Outstanding thermal and oxidation stability

Helps to reduce low temperature sludge build-up and high temperature deposits

Enhanced film strength at high temperatures

Helps to reduce engine scuffing and bore polishing

Inherent stay-in-grade shear stability

Wear protection and reduced oil consumption; helps to maintain viscosity in severe, high temperature service

Advanced formulation and viscometrics

Aids fuel economy

Low volatility

Helps to control oil consumption

Exceptional low temperature pumpability

Easy engine start-up and helps to reduce wear

Enhanced TBN quality reserve

Helps to deposit control and extended drain capability

Outstanding resistance to corrosion

Helps to extend life of critical wear surfaces

Long drain capability

Helps to increase operating efficiency and lower overall cost

Component compatibility

Long gasket and seal life, helps to extend service intervals



Mobil 1 Turbo Diesel Truck 5W-40 is recommended by ExxonMobil for use in all 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

• High performance gasoline engines and mixed fleets

• Refrigeration units


Specifications and Approvals

This product is recommended for use in applications requiring:



This product meets or exceeds the requirements of:







Caterpillar ECF-3






Properties and Specifications



SAE 5W-40

Kinematic Viscosity @ 100 C, mm2/s, ASTM D445


Kinematic Viscosity @ 40 C, mm2/s, ASTM D445


Density, 15.6C, g/cm3, ASTM D4052


Flash Point, Cleveland Open Cup, °C, ASTM D92


Pour Point, °C, ASTM D97



Health and safety

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