Synergy Fuels

Fuel types  

Gasoline and diesel for all types of vehicles

Wherever you are going, count on high quality Exxon and Mobil SynergyTM fuels to get you there. Learn more about our SynergyTM fuels and see which one is appropriate for your vehicle. .
  • Gasoline, Exxon and Mobil Synergy gasoline is Top Tier

    Go with Exxon and Mobil SynergyTM gasoline – it’s TOP TIER®

    Exxon and Mobil SynergyTM gasoline contains significantly higher quantities of detergents than required by the Environmental Protection Agency (EPA) and has passed key performance tests resulting in it being certified TOP TIER. TOP TIER fuel is recommended by many automakers in their vehicles’ owner manuals.

  • Diesel fuel, get good ignition quality with Synergy

    Get good ignition quality with SynergyTM diesel fuel

    Our Exxon and Mobil SynergyTM diesel is blended to provide good ignition quality and is held to high quality standards for our customers.

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  • Ethanol and Exxon and Mobil fuel

    Gasoline blended with ethanol

    Almost all gasoline now has some ethanol in it, including Exxon- and Mobil- branded gasoline which currently contains up to 10%.

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  • Octane ratings of gasoline and what level is right for your car

    Octane ratings of gasoline

    Find out what octane ratings measure and what octane level is right for your vehicle.
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Have a question about our fuel types?

TOP TIER is a standard of gasoline that contains higher levels of detergent additives than current Environmental Protection Agency (EPA) standards. The EPA requires that all gasoline marketed in the United States contain detergents, which are added to gasoline to help clean fuel injectors, intake valves and other engine parts.* The TOP TIER standard is set by a governing body of several automakers and is recommended in their vehicles’ owner manuals. Exxon and Mobil gasoline contains significantly more detergents than the minimum quantity required by the EPA and has passed other performance tests, such as deposit control on intake valves and fuel injectors, resulting in it being certified TOP TIER.

While diesel and gasoline are both derived from crude oil, they work in two different ways and are not interchangeable. Diesel fuel is designed to operate in a diesel engine, where it is injected into high-temperature air and ignites spontaneously under compression. This differs from gasoline, which is ignited by the spark plugs in a gasoline engine. It is essential that you put the right type of fuel in your vehicle.
We have stringent quality control procedures and active quality monitoring programs to help protect our fuels from manufacture through to distribution. Tests are conducted on the fuel at the refinery to ensure that it meets or exceeds engine manufacturer and industry specifications. Our additives are accurately injected as each delivery truck is filled at the terminal, ensuring the quality of our fuel and providing additional benefits. Finally, all of our service station gasoline dispensers have built-in filters to provide a final cleaning as the gasoline enters your vehicle tank.
Generally, regular gasoline will be fine. If the engine is 2-cycle (as commonly found for chain saws or edge trimmers), then 2-cycle oil will be required in the fuel. Consult your owner’s manual for a recommendation.
  • developing quality gas that’s best for your car

    Quality fuels to get you where you're going

    Discover what steps we take to ensure the quality of our fuels.

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  • Tips to help you improve fuel efficiency

    Get more out of every trip

    Explore our comprehensive list of tips to help you improve fuel efficiency and get more out of every trip.

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  • New Synergy gasoline

    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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  • About Synergy Gasoline for better gas mileage

    TOP TIER SynergyTM gasoline

    Get the facts about Exxon and Mobil SynergyTM branded gasoline, including what makes it TOP TIER® and what grades we offer.

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*Applies to Exxon- and Mobil-branded gasoline compared to gasoline meeting minimum U.S. government standards. Actual benefits vary depending on factors such as vehicle type, driving style and gasoline previously used.

**Fuel economy improvement is 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. Exxon, Mobil and Synergy are trademarks or registered trademarks of Exxon Mobil Corporation or one of its subsidiaries.