Truck in a desert with Mobil Delvac 1™ logo

Demand more from your engine oil.  

The lineup of Mobil Delvac 1™ heavy-duty diesel engine oils can help boost uptime and improve bottom lines for commercial fleets.

See the lineup

  • 2.6% fuel economy improvement with pump

    Mobil Delvac 1™ technology drives fleet performance

    When your trucks never stop running, 2.6 percent really adds up. See more results from independent testing with Mobil Delvac 1™ engine oils.

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  • a fleet of trucks moves down the highway fueled by Mobil Delvac products and solutions

    Energy efficiency guide: Saving energy on the road

    Use this helpful energy efficiency guide to make sure that your fleet and business save energy and money on and off the road.

    Learn more
  • ExxonMobil Optimized Oil Drain Interval Process with Mechanic

    Save money. Boost uptime. Extend oil drain intervals.

    The Optimized ODI Process works. See what Mobil Delvac™ lubricants and ExxonMobil engineers can do for you.

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  • Quote from Bighorn Enterprises owner on Mobil Delvac™ engine oil fuel economy

    Protection for your bottom line

    Discover how Mobil Delvac™ oils can help protect diesel engines even in Arctic conditions.

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Learn more about Proposed Category 11

  • Truck driver in front of black truck

    Ready for PC-11?

    Learn about the impact of the American Petroleum Institute’s latest diesel engine oil specification change on you, your trucks and your business.

    Learn more
  • a fleet of trucks moves down the highway fueled by Mobil Delvac products and solutions

    Energy efficiency guide: Saving energy on the road

    Use this helpful energy efficiency guide to make sure that your fleet and business save energy and money on and off the road.

    Learn more
  • CK-4 or FA-4?

    Find out which PC-11 oil is right for your trucks. See our OEM heavy-duty equipment chart for PC-11 product recommendations.

    Learn more
  • Mobil Delvac FAQ Image with Mechanics

    PC-11 FAQs

    There are a lot of questions surrounding the latest diesel engine oil specification change. Get more of the details behind PC-11 here.

    Learn more
  • Mobil Delvac Distributor Locator on Tablet

    Find a distributor near you

    Use our locator tool to find out where to buy Mobil Delvac™ products in your area.

    Find now
  • Coolant Antifreeze Mobil Delvac extended life prediluted

    Bumper-to-bumper product guide

    It’s easy to find the right Mobil Delvac™ product for any fleet application. Explore our bumper-to-bumper product guide now.

    Explore now
*A fuel economy evaluation was conducted using two Volvo FH500 6x2 Euro 6 trucks, loaded to 60 percent payload (circa 32,000kg). Testing was conducted on track at the Millbrook Proving Ground, Ltd. in the United Kingdom. Statistically significant fuel economy benefits were observed in the Volvo trucks when comparing Mobil Delvac 1™ ESP 5W-30 to a mineral 15W-40 engine oil with an average fuel economy gain of 2.6 percent for city driving conditions. Corrections were applied when changes in test environment had a statistically significant impact on fuel economy. Fuel economy improvements are dependent on vehicle/equipment type, outside temperature, driving conditions and your current fluid viscosities.
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