https://en.wikipedia.org/wiki/Top_Tier_Detergent_Gasoline
Top Tier Detergent Gasoline and Top Tier Diesel Fuel are performance specifications and trademarks designed and supported by several automakers.BMW, General Motors, Fiat Chrysler Automobiles, Ford, Acura/Honda, Toyota, Volkswagen, Mercedes-Benz, Navistar, Tesla, and Audi support the gasoline standard, while General Motors, Volkswagen, Detroit Diesel, and …