Synergy Diesel Efficient™ fuel for fleets, light-duty trucks and passenger vehicles
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Increase fuel economy by an average of 2%* in commercial vehicles
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Restore engine power and responsiveness
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Reduce CO2 tailpipe emissions*
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Improve injector cleanliness and provide corrosion protection
See how we developed Synergy Diesel Efficient fuel — and what its advanced formulation can mean for your business.
Keep business on the road
Broad commercial fleet card acceptance
Manage your mixed-fleet and heavy-duty business and fuel expenses with even broader acceptance of EFS, Fleet One and T-Chek fleet cards at Exxon™ and Mobil™ high-speed diesel and retail pumps.
Find a station
Here, there and everywhere
Go further with your fleet card
Manage your fleet’s fuel expenses with FleetPro™ or BusinessPro™ credit cards. Both offer nationwide location acceptance, spending controls and reporting, flexible terms, loyalty benefits for you and your employees, and 24/7 customer service.
Learn more about FleetPro™ and BusinessPro™ credit cards-
Download the Exxon Mobil Rewards+™ app
It’s the convenient, fast and secure way to pay for gas, earn points and get rewarded through the Exxon Mobil Rewards+™ program. Start saving with every fill-up of gasoline.
Details about the Exxon Mobil Rewards+ app -
Quality fuel, discounted pricing and rewards for drivers
No matter the size of your fleet, we have a fleet program that can help you control costs and improve fuel economy.
Learn more -
Fuelman® is welcome everywhere
Now you can fill up with Synergy Diesel Efficient™ using your Fuelman® credit card at all 12,000+ locations, with 800+ Exxon and Mobil high-speed diesel pumps across the country.
See where Fuelman is accepted -
Diesel engine oils
Mobil Delvac™ diesel engine oils are the choice of leading heavy-duty equipment manufacturers as well as drivers and fleets around the globe when it comes to keeping engines protected on the road.
Learn more about Mobil Delvac diesel engine oil
*Synergy Diesel Efficient fuel claims are based on internal and third-party vehicle engine testing, laboratory testing, and/or industry or other scientific literature. Basis for comparison for all claims is versus unadditized diesel. Fuel economy and tailpipe CO2 emissions testing was performed at independent testing labs in the UK and US using on-road third-party customer trucks. Actual results may vary based on factors such as vehicle type, engine type, driving behavior, and other factors. Exxon Mobil Synergy Diesel Efficient fuel may be used in other heavy-duty and light-duty vehicles, but 2% average fuel economy improvement claim does not apply. Concentration and availability of our proprietary additive package may vary.
†Product availability may vary by location. Participating Exxon and Mobil retail stations are located in NY, PA, OH, MI, CT, IL, NJ, IN, MA, MO, MT, RI, WA and WI. Actual benefits will vary depending on factors such as base diesel fuel composition, ambient temperature, vehicle/engine type, driving style, diesel fuel previously used, vehicle and fuel storage conditions, and other factors. Additive concentration and availability of winterized Synergy Diesel Efficient fuel may vary based upon factors beyond our control.
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