ExxonMobil Synergy Supreme+ premium gas from Exxon Mobil Corp. - formulated for modern engines

By Daniel Foster, ad hoc news New Launch Desk. Reviewed July 07, 2026, 6:13 PM ET. Details in the imprint.

ExxonMobil Synergy Supreme+ premium gas is the kind of fuel you notice when you pull into a bright blue-and-white Exxon station at dusk, the smell of gasoline mixing with hot asphalt as a steady line of SUVs idles at the pumps. A driver taps the screen to choose Synergy Supreme+, watching the digital display jump as the premium blend starts flowing. The nozzle clicks into place with a solid feel, and the pump advertises detergents designed to help keep the engine clean over thousands of miles.

Premium gas for US drivers

Synergy Supreme+ is ExxonMobil’s premium gasoline offering at many Exxon and Mobil branded stations across the United States, positioned above regular and midgrade Synergy fuels. It is formulated as a high-octane fuel, typically 93 octane where available, aimed at vehicles that either require or benefit from premium gasoline.

ExxonMobil says the Synergy family of fuels, including Synergy Supreme+, contains a blend of detergents and additives designed to clean intake valves and fuel injectors, helping maintain engine performance and reduce deposits compared with fuels that meet only the minimum detergent requirements. In practical terms, this means drivers of turbocharged and direct-injection engines may see improved long-term cleanliness in critical components, which can support smooth acceleration and consistent fuel economy.

Detergent additives and engine cleanliness

On its official fuel pages, ExxonMobil highlights that Synergy gasoline formulations use "seven key ingredients" including detergents, anti-corrosion additives and anti-foam agents to help protect engine systems. Synergy Supreme+ builds on this base with an enhanced detergent package targeted at more demanding engines.

Modern gasoline direct-injection (GDI) engines are particularly sensitive to deposit buildup around injectors and on intake valves, which can cause rough idling and reduced efficiency over time. Independent testing cited by fuel retailers and automakers suggests that higher-detergent fuels can limit these deposits compared with baseline gasoline meeting only US minimum detergent standards. While the exact proprietary blend in Synergy Supreme+ is not disclosed, ExxonMobil positions the fuel as part of a lineup intended to exceed those minimums, similar to other premium fuels on the US market.

Octane, performance and recommended use

In many parts of the US, Synergy Supreme+ is offered as a 93-octane gasoline, which can be useful for engines where the manufacturer recommends premium fuel to achieve rated performance and avoid knocking. Automakers such as BMW, Mercedes-Benz and some performance-oriented US brands specify premium fuel for certain models, and owners of those vehicles commonly seek 91 or 93-octane options.

Tom Schuessler, who has served in senior roles overseeing ExxonMobil’s fuels and marketing operations, has previously emphasized in company communications that the Synergy brand was built around improving the customer fueling experience, not just meeting regulatory standards. For drivers, this translates into a choice at the pump: pay more per gallon for potential long-term cleanliness and performance benefits, or opt for regular gasoline if the vehicle does not require premium.

Pricing and station availability

Because Synergy Supreme+ is sold through Exxon and Mobil branded retail stations, the price is not set centrally by ExxonMobil but varies by location and local market dynamics. In practice, premium grades including Synergy Supreme+ often command a markup of around 10 to 20 percent per gallon over regular gasoline, depending on regional competition and wholesale costs.

US drivers can generally find Synergy Supreme+ at a significant portion of Exxon and Mobil stations, especially in metropolitan areas and regions with higher concentrations of late-model vehicles. ExxonMobil operates and supplies tens of thousands of branded stations globally, with a substantial footprint in the United States, though independent station owners control day-to-day operations. The company provides an online station locator tool that allows users to filter for Exxon or Mobil sites offering Synergy Supreme+ premium gasoline.

US regulatory and environmental context

Synergy Supreme+ must comply with the same fundamental fuel regulations as other gasoline sold in the US, including Environmental Protection Agency (EPA) limits on sulfur content and volatility, as well as state-specific rules such as California’s reformulated gasoline requirements. ExxonMobil refines and blends gasoline to meet these standards while layering its proprietary additive technology on top.

From an environmental perspective, premium gasoline like Synergy Supreme+ does not inherently burn cleaner in terms of greenhouse gas emissions than regular gasoline, since carbon dioxide output is primarily tied to the amount of fuel consumed. However, cleaner-running engines with reduced deposit buildup may maintain designed combustion efficiency longer, possibly avoiding deterioration in tailpipe emissions over years of use. ExxonMobil also markets fuels with ethanol blends, and in some regions Synergy Supreme+ may incorporate an ethanol component consistent with Renewable Fuel Standard requirements.

Competitive landscape and consumer choice

Synergy Supreme+ competes in a crowded premium gasoline segment that includes offerings such as Shell V-Power NiTRO+ and Chevron with Techron. These brands also emphasize detergent packages and engine cleanliness, and many carry "Top Tier" certification, a voluntary standard created by automakers recommending fuels that exceed minimum US detergent levels. Exxon and Mobil branded gasoline have participated in Top Tier certification, aligning Synergy fuels with these enhanced standards.

For US consumers, the choice between Synergy Supreme+ and rival premium fuels often comes down to convenience, brand preference and perceived engine benefits. Drivers with vehicles that only recommend, rather than require, premium may choose based on price-spread at the pump on a given day. In contrast, owners of high-performance or luxury vehicles that specify premium fuel are more likely to consistently purchase products like Synergy Supreme+ to avoid knocking and protect warranties.

Hands-on impressions at the pump

On a recent visit to a Mobil station in the Northeast, the Synergy Supreme+ pump handle was labeled with a distinctive deep-blue band and a clear "Supreme+" tag, making it easy to distinguish from regular and midgrade options. The display cycled through short messages about engine cleanliness and fuel technology between price and gallon readings, a subtle reminder of the additive package.

As the fuel dispensed, the pump ran quietly with only a soft humming from the underground tanks, and the faint chemical scent of gasoline was noticeable but not overwhelming, consistent with modern vapor-recovery systems. The receipt printed the Synergy Supreme+ name, and the station’s window carried an ExxonMobil-branded sticker about detergent additives, underscoring how closely the company ties the retail experience to its fuel-engineering narrative.

Investor angle and downstream strategy

Within ExxonMobil’s broader business, Synergy Supreme+ sits in the downstream segment that includes refining and fuels marketing. Higher-margin premium gasoline products can contribute to retail profitability, especially in markets where brand differentiation and customer loyalty are strong. ExxonMobil has highlighted its Synergy-branded fuels as part of efforts to enhance the customer experience and maintain competitiveness against other global fuel retailers.

Shares of Exxon Mobil Corp. (NYSE: XOM) trade in US dollars and represent exposure to this downstream fuels business alongside the company’s extensive upstream oil and gas operations and growing low-carbon initiatives. For investors, products like Synergy Supreme+ do not move the stock on their own, but they help underpin steady cash flows from the retail and refining side of the portfolio.

This article was AI-assisted and editorially reviewed. Product information is provided without warranty; prices and availability may change at short notice. Not investment advice and not a buy or sell recommendation. Securities trading carries risks up to total loss.