Top Tier Detergent Gasoline

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Top Tier Detergent Gasoline and Top Tier Diesel Fuel are performance specifications and trademarks designed and supported by several automakers.^[1] BMW, General Motors, Fiat Chrysler Automobiles, Ford, Acura/Honda, Toyota, Volkswagen, Mercedes-Benz, Navistar, Audi, and Volvo support the gasoline standard, while General Motors, Volkswagen, Detroit Diesel, and Navistar support the diesel standard (as of 2018^[update]). Top Tier fuels must maintain levels of detergent additives that are believed to result in a higher standard of engine cleanliness and performance as compared to the United States Environmental Protection Agency (EPA) requirement. In addition, Top Tier fuels may not contain metallic additives, which can harm the vehicle emission system and create pollutants. As of 2018, Top Tier Detergent Gasoline is available from 61 licensed retail brands, and Top Tier Diesel Fuel is available from 5 licensed retail brands.

Licensed Top Tier fuel retailers use a higher level of detergent additive which can increase fuel economy and optimal engine performance. According to an automotive industry spokesman, the regular use of this type of gasoline results in improved engine life.^[2]

The Top Tier standards must apply to all grades of gasoline or diesel that a company sells, whether it is economy (low-octane) or premium (high-octane).^[3]

^ Gorzelany, Jim (November 17, 2021). "What Is Top Tier Gas?". CARFAX. Retrieved April 12, 2023.
^ Cole, Craig. "Which Gas Stations Sell the Best Quality Gasoline?". www.autoguide.com. Chris Martin, a spokesman for Honda said 'we've supported it [Top Tier gasoline] because we've seen a benefit from it for our consumers in the long run.' . . . . 'We don't require that our vehicle owners use Top Tier gas' Martin said, but it helps 'make sure the engines are going to last as long as they could.'
^ "Deposit Control Standards". Retrieved January 22, 2016.

[1] Gorzelany, Jim (November 17, 2021). "What Is Top Tier Gas?". CARFAX. Retrieved April 12, 2023.

[2] Cole, Craig. "Which Gas Stations Sell the Best Quality Gasoline?". www.autoguide.com. Chris Martin, a spokesman for Honda said 'we've supported it [Top Tier gasoline] because we've seen a benefit from it for our consumers in the long run.' . . . . 'We don't require that our vehicle owners use Top Tier gas' Martin said, but it helps 'make sure the engines are going to last as long as they could.'

[dcontrol-3] "Deposit Control Standards". Retrieved January 22, 2016.

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