Heavy-Duty Oils

Drivers across the globe rely on Mobil Delvac™ engine oils — for 80 years, a recognized leader in heavy-duty lubricants. Mobil Delvac is:

– Chosen by many of the world’s leading heavy duty original equipment manufacturers.

– The #1 brand of diesel engine oil sold at truck stops.*

Mobil Delvac meets and often exceeds the needs of today’s original equipment manufacturers and commercial vehicle professionals. There is a lubricant to meet the needs of your vehicle whatever your operating conditions.

*Based on a 2011 survey of bulk diesel oil sales at U.S. truck stops.

eingine_oilEngine Oils
Mobil Delvac™ diesel engine oils cover heavy, medium and light commercial vehicle applications and can help to achieve long engine life with extended service intervals.


Mobil™ high-performance greases can give first-rate stability against oxidization and moisture intrusion as well as excellent corrosion protection and flow characteristics, even at very low temperatures.


gear_oilGear Oils
Mobil Delvac™ gear oils have been specially developed for truck transmissions, axles and final drives that operate even under the most demanding conditions.


manual_automatic_transmission_fluidManual and Automatic Transmission Fluids
Mobil™ transmission oils include synthetic products and can offer excellent protection against high-temperature and high-speed wear whilst also providing outstanding cold-temperature performance.


Mobil Fleet 15W-40

High Performance Diesel Engine Oil

Product Description

MOBIL FLEET 15W-40 is designed for high-speed, four-stroke engines and is also designed to meet 2007 model year on-highway exhaust emission standards. This oil is effective at sustaining emission control system durability where particulate filters and other advanced aftertreatment systems are used. Optimum protection is provided for control of catalyst poisoning, particulate filter blocking, foaming, oxidative thickening and viscosity loss due to shear. When using CJ-4 oil with higher than 15 ppm sulfur fuel, consult the engine manufacturer for service interval.

Mobil Fleet 15W-40 meets or exceeds the demands of API service classification CJ-4/CI-4 Plus/CI-4/CH-4/SM. It meets the requirements of Mack EO-O Premium Plus, VOLVO VDS-4, CAT ECF-3, Detroit 93K218, MTU Oil Category 2.1, and Cummins CES 20081.