Need to fill up with premium gas? Learn all about our best fuel ever, Synergy Supreme+™

Synergy Supreme+ top tier gas graphic hero image

Ready to treat your engine right? With Synergy Supreme+ premium quality gas, you can keep your engine 2X cleaner for better gas mileage.‡ That means it’s not just our best fuel ever – it could even be your engine’s favorite fuel ever.

Synergy Supreme+ premium gas generally has an octane level of 93, but may be blended and sold at an octane level of 91 or 92 in certain areas of the US. So what are some of the benefits of premium gas with a high octane level?

Octane ratings are a measure of fuel stability. Using a lower octane fuel than required for your vehicle may damage the engine and emissions control system over time. So when it comes to regular gas vs premium, 91-93 octane gas provides improved performance and fuel economy in vehicles designed to run on premium gasoline. Every time you fill up with top tier gasoline, you’re helping keep your engine happy.

Our top tier gas offers better clean for better gas mileage

Fuel injectors – like spray bottles – don’t work well when they’re clogged. When it comes to functionality, fuel injectors are an essential part of your car’s engine, delivering fuel at the right time to ensure efficient combustion. Some lower tier gas can leave deposits on fuel injectors, resulting in decreased performance. This is one of the big differences between premium gas vs regular that can make a big impact.

Synergy Supreme+ premium gas contains detergent that helps remove deposits – for cleaner fuel injectors, better fuel economy and smoother engine operation. Here’s how it works:

  • Deposits accumulate on port fuel injection (PFI) intake valves and gasoline direct injection (GDI) fuel injectors
  • Our Synergy Supreme+ premium gas contains significantly more cleaning agents than federal standards require leading to outstanding cleanliness
  • It keeps your engine clean by reducing deposit buildup
  • It even cleans up your engine by removing existing deposits left behind by gasoline that meets minimum government standards††

Premium gas helps reduce friction and protect against engine

Whether it’s your dancing shoes or engine parts, friction means wear and tear. When moving engine parts aren’t protected, friction can contribute to erosion and wear, not to mention the extra strain on your engine caused by the heat. Excess friction might reduce engine efficiency and performance with time. By fueling up with premium gasoline, you’ll help safeguard your engine from friction.

We added a friction modifier to Synergy Supreme+ premium gas to prevent friction and provide you with our best engine protection ever. What that means for your vehicle:

  • Our friction modifier reduces wear and tear by 30%‡‡
  • It prevents metal surfaces from rubbing together, which can lead to improved performance and fuel economy
  • You get a top tier gasoline that protects vital engine parts

  • 2X points on premium gas vs regular

    Unlock Exxon Mobil Rewards+ Premium™ status§

    Get 2X points on Synergy Supreme+™ premium gas – plus special offers — when you achieve Premium Status. Just fill up three times a month with 8 or more gallons of premium gasoline to enjoy double points!

    Details and registration
  • Premium diesel fuel economy with Bob Oakman

    Learn about our Synergy Diesel Efficient™ fuel

    Believe the hype. Synergy Diesel Efficient fuel is fully formulated to help keep commercial vehicle engines cleaner for 2% better diesel fuel economy.** Take it from Bob Oakman, legendary monster truck announcer. Available only at Exxon™ and Mobil™ stations.

    Learn more
  • Find and buy premium gas near me with the app

    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 fuel-up of top tier gasoline.

    See app details
  • new applicants only earn 42cent

    Exxon Mobil Smart Card+™

    New accounts earn up to 42¢/gal*: Get 30¢/gal* as a bonus statement credit for your first two months after account open date. Plus, get 12¢/gal* in instant savings on every gallon of Synergy Supreme+™ premium gasoline or 10¢/gal* on other grades of Synergy™ fuel every time you fill up with our gas credit card.

    Learn more

Based on comparison of Synergy Supreme+ gas compared to Synergy regular gas in port fuel injected engines. Actual benefits are based on continuous use and may vary depending on vehicle type, driving style, and gasoline previously used. Concentration and availability of our proprietary additive package may vary based on factors beyond our control.

††Based on comparison of Synergy Supreme+ premium gas to gasoline that meets minimum government standards. Actual benefits are based on continuous use and may vary depending on vehicle type, driving style, and gasoline previously used. Concentration and availability of our proprietary additive package may vary based upon factors beyond our control.

‡‡Based on Synergy Supreme+ gas compared to gasoline meeting minimum government standards. Wear reduction was measured by an industry standard lubricant test. Actual benefits are based on continuous use and may vary depending on vehicle type, driving style, and gasoline previously used. Concentration and availability of our proprietary additive package may vary based on factors beyond our control.

§Exxon Mobil Rewards+ Premium Status (“Premium Status”) is achieved by making three (3) “Qualifying Purchases” in a calendar month. A Qualifying Purchase is defined as a purchase of 8 gallons or more of Synergy Supreme+ fuel with the Exxon Mobil Rewards+ program. You must present and use your Exxon Mobil Rewards+ card loyalty identifier prior to making a Qualifying Purchase at participating locations. Exxon Mobil Rewards+ Premium Status Benefits (“Benefits”) begin after Premium Status is earned. You must complete three Qualifying Purchases each calendar month to maintain your Benefits. In the event that Premium Status is not maintained in the following month, you have a grace period of three consecutive months starting from the end of the month in which Premium Status was last earned before your Premium Status benefits expire. Benefits include earning double base points (for a total of 6 points per gallon) on all Synergy Supreme+ purchases after earning and while maintaining Premium Status. You will also be eligible for various Premium Status offers and experiences that are available to Exxon Mobil Rewards+ Premium Status members. To view full Exxon Mobil Rewards+ terms, please click here. Your Premium Status is non-transferrable and does not preclude you from using other Exxon Mobil Rewards+ offers, unless specified. The Exxon Mobil Rewards+ Program Terms and Conditions apply.

§§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.

**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.

*Subject to credit approval. New accounts only. The up to 42¢ per gallon discount applies for the first 2 months after your account open date. The up to 42¢ per gallon discount is comprised of the ongoing fuel savings of 12¢ per gallon on Synergy Supreme+™ premium gasoline or 10¢ per gallon on other Synergy™ fuel grades, which will be received as a reduced fuel price at the point of sale, plus a 30¢ per gallon bonus discount applied as a statement credit. Bonus discounts will be paid as a statement credit after qualifying purchases are made within the first 2 months from account open date. Offer valid at participating Exxon and Mobil stations. In the event discounts at the point of sale are unavailable for any reason, you will receive the earned discounts as a statement credit. You can earn 5% back in statement credit rebates on your first $1,200 in Exxon and Mobil non-fuel purchases made each year with your card at Exxon and Mobil locations. Qualifying in-store purchases exclude lottery tickets, money orders and gift cards. Exxon Mobil Rewards+™ points will not be earned on purchases made with the Exxon Mobil Smart Card+™ credit card. Terms & Conditions of the Exxon Mobil Smart Card+ Program apply.

*Based on comparison of engine cleanliness from using Synergy Supreme+ gas compared to Synergy regular gas in port fuel injected engines. Actual benefits are based on continuous use and may vary depending on vehicle type, driving style, and gasoline previously used. Concentration and availability of our proprietary additive package may vary based on factors beyond our control.

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