Unleaded and Premium Unleaded Gas - Synergy Fuel from Exxon and Mobil

Our gasoline  

Helping to improve fuel economy and performance.

Introducing Esso SynergyTM Gasoline

7 key ingredients. Engineered to help improve fuel economy.**

Meet the team:
Solvent Fluid #1 – enables the additive ingredients to stay mixed and to flow, and not freeze at very cold temperatures
Solvent Fluid #2 – enables the detergent to be delivered in the most compact form, resulting in a more efficiently sized package
Anti-Adhesion Compound – helps prevent fuel detergents from forming a sticky film on the intake valves; which in turn helps prevent cold start problems at cold temperatures
Corrosion Inhibitor – helps prevent rust in fuel distribution system and/or key engine parts the fuel comes into contact with such as the gas tank and the intake valves
Demulsifier – helps keep water from getting entrained in our additive in the distribution system. Helps prevent accumulation of water in your gas tank by allowing it to be separated and removed
Fuel Detergent – helps provides excellent protection against intake valve deposits in traditional PFI (Port Fuel Injector) injection engines. Cleaner engine parts can lead to better improved fuel economy
Marker Molecules – ensures we can determine the correct amount of our additive is added to our gasoline

TOP TIER® SynergyTM gasoline – quality you can depend on

When you fill up at an Esso branded station, you can be confident you’re getting TOP TIER gasoline, every time. Our SynergyTM gasoline features 7 key ingredients for greater cleaning power and is engineered to help improve fuel economy and performance.**

Esso SynergyTM gasoline grades

Gasoline grades are based on octane ratings. The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. Esso gasoline is available in three octane grades across Canada and four in the greater Toronto area. To determine which SynergyTM gasoline grade is best for your vehicle, check your owner’s manual.


Learn more about octane ratings >

  • Esso Regular Gasoline

    Octane 87

    Our regular grade unleaded gasoline was developed to meet the needs of most vehicles in Canada and is our most popular gasoline.


  • Esso Extra Gasoline

    Octane 89

    Our midgrade unleaded gasoline was developed to meet the needs of vehicles that can benefit from a higher octane, such as some sport vehicles and high performance cars.

  • Esso Supreme Gasoline

    Octane 91


    Our premium grade unleaded gasoline was formulated with a higher octane level and more cleaning agents to meet the demands of some of today’s most advanced engines. Outside of Toronto and surrounding areas, Esso Supreme is the highest-octane gasoline available at Esso stations across Canada.

  • Esso SUPREME+ Gasoline

    Octane 93

    Esso SUPREME+, our highest octane gasoline, is only offered in select stations in the greater Toronto area. Esso SUPREME+ contains more cleaning agents than our other Esso gasoline grades, which, in turn, have higher levels of detergency than the minimum government standards.

FAQs about gasoline

When you purchase gasoline at an Esso-branded gas station, you can be sure your vehicle is receiving TOP TIER fuel. TOP TIER is a more stringent standard of gasoline that was established by a governing body of automakers and is recommended in vehicles’ owner manuals because it exceeds the minimum level of detergent additives mandated by the Canadian Government Standards Board (CGSB). Esso gasoline contains significantly higher detergent levels than CGSB requirements and has passed a series of deposit control performance tests, resulting in it being certified TOP TIER. Not only does our gasoline help keep vital engine parts clean, we also remove deposits as you drive.
Yes! Detergents are added to gasoline to help clean vital engine parts, including fuel injectors and intake valves. While the Canadian government has mandated that all gasoline marketed in Canada contains detergents, our gasoline contains significantly more than the minimum quantities required. A gasoline detergent is a lot like a household detergent, helping to remove any harmful deposit buildup on intake valves and keeping fuel injectors clean.*
If you filled your tank prior to the 1990's, you might remember that there were two choices of gasoline: "regular" and "unleaded." At the time, "regular" gasoline contained tetraethyl lead, which served as an octane booster in fuel. All vehicles manufactured after 1975 are built with catalytic converters and require unleaded gasoline. Catalytic converters help convert pollutants in exhaust to less toxic gasses such as carbon dioxide, nitrogen, and water vapor. Due to environmental concerns, leaded gasoline was phased out in the 1990’s and can no longer be sold at any gas station in Canada. Today, "regular gas" no longer refers to gasoline with lead content, but rather to a certain grade of unleaded gasoline.
The performance of gasoline is determined by multiple factors, including its antiknock quality (also known as octane rating), its volatility, and its detergency. Check your owner’s manual to see what octane rating is right for your vehicle.
Antiknock, also known as octane rating, is a measure of the gasoline's ability to resist knocking or pinging during combustion. Since it is gasoline vapor rather than liquid fuel that ignites, the air-to-fuel mixture must be correct for smooth combustion. The higher the octane rating, the greater the engine's resistance to knock. Some of the problems associated with knock are overheating of critical engine parts – namely valves, pistons and spark plugs. To minimize the effects of knocking, modern engines are equipped with knock sensors, which temporarily delay the spark timing in the piston’s compression cycle. While this prevents audible knocking, delaying the ignition spark also sacrifices engine efficiency.
Detergency is the performance characteristic of a gasoline that refers to its ability to clean and protect the fuel delivery system, including the carburetor or fuel injectors, and intake valves. A gasoline detergent is fundamentally like a household detergent. It is a molecule that affixes itself to dirt particles. As gasoline passes through a car's engine, the molecule helps clean away dirt particles and helps to prevent any harmful deposit build-up.
  • Quality fuel to get you where you're going

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

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  • The right fuel for your vehicle

    Get more out of your engine, and your journey, with Esso Synergy™ gasoline.

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  • 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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  • Introducing Esso SynergyTM Gasoline

    Learn more about our new SynergyTM gasoline, powered by 7 key ingredients and engineered to help improve fuel economy.**

    Learn more
Esso and Esso Extra are trademarks of Imperial Oil Limited. Imperial Oil, licensee.
*Applies to Esso-branded gasoline compared to gasoline meeting minimum Canadian government detergency standards, where applicable. Actual benefits vary depending on factors such as vehicle type, driving style, and gasoline previously used.
**Improvements, such as fuel economy, are based based on Synergy-branded gasoline, where available, compared to gasoline meeting minimum Canadian government detergency standards. Actual benefits will vary depending on factors such as vehicle type, driving style, and gasoline previously used. All trademarks used herein are trademarks or registered trademarks of Exxon Mobil Corporation or one of its subsidiaries. 

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