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Photo of legendary monster truck announcer Bob Oakman holding a Synergy Diesel Efficient fuelling nozzle, Synergy Diesel Efficient Fuel Technology logo. Headline reads I want to marry this diesel fuel. No prenup.

Synergy Diesel Efficient™ fuel for truck fleets

Believe the hype as only Bob Oakman can deliver it. Synergy Diesel Efficient fuel is pre-additized, helping you go up to 2% further without the hassle, as compared to diesel without a detergent additive. It helps keep your engine cleaner for better fuel economy, which can mean less maintenance and downtime — to improve your bottom line. Only available at select Esso Commercial Cardlocks™, Esso™ and Mobil™ stations, where science and trucking come together. Synergy Diesel Efficient fuel has a unique formulation that helps to:
Improve your fuel economy: Testing showed an average improvement of 2%*
Boost engine power and responsiveness
Reduce emissions and burn cleaner
Improve injector cleanliness and provide corrosion protection
Graphic of pinpoints on a sample map. Heading reads Explore our growing network of Esso Commercial Cardlocks and TA, Petro and TA Express travel centres. Button reads Find a cardlock location near you bg-map
Find Esso travel centres and cardlocks in Eastern Canada
where Synergy Diesel Efficient™ fuel is available >
Graphic of pinpoints on a sample map. Heading reads Explore our growing network of Esso Commercial Cardlocks and TA, Petro and TA Express travel centres. Button reads Find a cardlock location near you bg-map
Find Esso travel centres and cardlocks in Eastern Canada where Synergy Diesel Efficient™ fuel is available >

Get a closer look

For Challenger Motor Freight of Cambridge, Ontario, cleaner-burning fuel and cleaner engines means less downtime – and a better bottom line.
When drivers and owner-operators at Challenger Motor used Synergy Diesel Efficient fuel, their trucks had better fuel mileage and performance.
See how a northern B.C. fleet increased its fuel economy and reduced engine maintenance using Diesel Efficient fuel (branded Esso since it was delivered to their on-site fuel tank).
See how we developed Synergy Diesel Efficient fuel — and what its advanced formulation can mean for your business.

Frequently asked questions about Synergy Diesel Efficient fuel

What is Synergy Diesel Efficient fuel?

Synergy Diesel Efficient fuel is a diesel fuel that is specially engineered to help improve fuel economy and boost engine performance by cleaning up injector deposits. This new fuel also helps improve power, increase engine responsiveness and reduce emissions. Synergy Diesel Efficient fuel can also help eliminate internal injector sticking which can contribute to premature injector failure. Further, Synergy Diesel Efficient fuel offers excellent fuel system corrosion protection. Finally, Synergy Diesel Efficient fuel can help prevent premature fuel filter plugging.

Synergy Diesel Efficient fuel has been real world tested. An on-highway fleet average fuel economy benefit of 2%* has been demonstrated in testing with Synergy Diesel Efficient fuel at independent test labs following scientifically designed protocols.

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

What types of engines would benefit from using Synergy Diesel Efficient fuel?

Synergy Diesel Efficient fuel is designed to provide benefits with light, medium and heavy duty diesel engines from different manufacturers, including on-highway heavy duty trucks.

Why would I need to use an advanced diesel fuel such as Synergy Diesel Efficient fuel today?

Modern diesel engines have very sophisticated fuel systems engineered to meet today’s stringent diesel engine emissions requirements. Deposits on the injector needle guide, which has only 2-3 microns tolerance, can jam the needle movement and cause early failure of the injectors. Deposits which build up inside the injector nozzle can restrict fuel flow, deteriorate the fuel spray quality and result in loss of engine power, increased emissions and reduced fuel economy. Synergy Diesel Efficient fuel helps prevent deposit formation and cleans up the existing deposits that may be negatively affecting your engine performance.

How is Synergy Diesel Efficient fuel different from other fuels?

Synergy Diesel Efficient fuel is treated with a patented additive package that is specially designed to clean up both internal injector deposits and nozzle deposits. Research demonstrates that Synergy Diesel Efficient fuel can help improve the performance of your diesel engine.

What kind of independent testing was done to support your claims?

Fleet demonstrations have been carried out at independent testing facilities. The test protocols used were scientifically designed to tightly control important factors such as vehicle load, driving styles, ambient conditions, and test equipment. This robust approach to testing helps ensure that the observed differences are from Synergy Diesel Efficient fuel and not from other factors. The result of this controlled testing was a 2% on-highway fleet average fuel economy improvement.*

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

How does Synergy Diesel Efficient fuel compare to "off-the-shelf additive in a bottle"?

Intensive research and product development has been done to ensure that Synergy Diesel Efficient fuel is not only effective, but will also cause no harm to your engine. Another advantage of Synergy Diesel Efficient fuel is that the additive treat rate is optimized to yield the desired engine performance. Since the formulation is homogenized at the terminal, no additional mixing is required upon receipt.

When I convert to Synergy Diesel Efficient fuel, will my fuel filter costs go up?

The first two to three tankfuls may result in a more frequent fuel filter replacement interval. This is due to Synergy Diesel Efficient fuel “cleaning up” the fuel system. After the initial “clean-up” process, there may be an increase in filter life as Synergy Diesel Efficient fuel can improve the filterability of the fuel filter. Synergy Diesel Efficient fuel can protect filters from plugging by saturated monoglycerides, which are introduced with biodiesel and are the lead cause of premature filter blocking. Synergy Diesel Efficient fuel can also improve fuel thermal stability which helps prevent filter plugging from decomposed fuel.

Will I still benefit from Synergy Diesel Efficient fuel even if I have a new, clean fuel system?

Yes, one of the best ways to prevent deposits from forming in a new, clean fuel system is to use Synergy Diesel Efficient fuel. The "keep clean" technology manages deposit precursors and helps prevent them from attaching to either internal or external injectors surfaces.

Will Synergy Diesel Efficient fuel accelerate the ash loading of the diesel particulate filter?

Synergy Diesel Efficient fuel contains ashless detergent technology and therefore should not contribute to the ash loading of the diesel particulate filter. Synergy Diesel Efficient fuel can clean up injector deposits to promote better spray quality and better fuel/air mixing. In theory it should reduce engine particulate matter emissions and soot loading in the DPF, (no direct testing has been carried out to demonstrate this).

*Applies to Synergy Diesel Efficient fuel compared to diesel fuel without detergent additive. Vehicle testing showed an average fuel economy improvement of 2%. Actual benefits will vary depending on factors such as vehicle/engine type, driving style and diesel fuel previously used. Concentration and availability of our proprietary additive package may vary based upon factors beyond our control.