Bob Oakman at a Synergy Diesel Efficient gas station saying he wants to marry this brand of diesel fuel

Synergy Diesel Efficient™ fuel for light-duty trucks and passenger vehicles

Synergy Diesel Efficient fuel inspires legendary monster truck announcer Bob Oakman to amp up the oomph. Watch the video to find out how crazy he can get. Believe the hype.

Enjoy the benefits of its unique formulation

Only available at select Exxon and Mobil stations, Synergy Diesel Efficient fuel is fully formulated to help keep your engine cleaner for better diesel fuel economy.**

  • fuel tank icon

    Increase fuel economy* — so you can go more miles on every tank

  • engine icon

    Enhance engine performance for improved power

  • Download Icon

    Reduce emissions and burn cleaner

  • Gear on Shield

    Protect your engine from dirty injectors


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    The right fuel for your vehicle

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    Exxon and Mobil Synergy™ gasoline

    Learn more about our Synergy™ gasoline, engineered with 7 key ingredients to help you get better gas mileage.§§

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*Applies to Exxon and Mobil Synergy Diesel Efficient branded fuel compared to diesel fuel without detergent additive, and assumes a 250 gallon tank and an average of 7 miles per gallon. Vehicle testing showed an average fuel economy improvement of 2 percent. Actual benefits will vary depending on factors such as vehicle/engine type, driving style and diesel fuel previously used.

**Claims apply to Exxon and Mobil Synergy Diesel Efficient-branded fuel compared to diesel fuel without detergent additive. Actual benefits will vary depending on factors such as vehicle/engine type, driving style and diesel fuel previously used.

*** Applies to a maximum 10-gallon fill-up. Offer valid only for new Exxon Mobil Rewards+ members. Valid through 12/31/2020.

§§Benefits are based on Synergy-branded gasoline compared to gasoline meeting minimum U.S. government standards. Actual benefits will vary based on factors such as vehicle type, driving style and gasoline previously used.

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