better mileage with clean engine

Synergy Diesel Efficient™ fuel for light duty trucks and vehicles

Believe the hype. Synergy Diesel Efficient keeps your engine cleaner for better mileage. Only available at Exxon™ and Mobil™ stations, it’s the first widely-available diesel of its kind and its unique formulation helps to:

  • 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


Want more information on Synergy Diesel Efficient fuel?


*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.

© 2019 ExxonMobil. All trademarks used herein are trademarks or registered trademarks of Exxon Mobil Corporation or one of its subsidiaries. All rights reserved.