Among the top gasoline brands on Top Tier Gasoline are 76, Exxon, Shell, Mobil, Texaco and Valero. Top Tier Gasoline rates gasoline retailers on the quality of the gasoline sold and how it builds up in combustion chambers.
Some brands of gasoline cause more engine build-up than others. Top Tier Gasoline compiles input from auto manufacturers, drivers and retailers. That information is used to recognize gasoline brands that are the most friendly to combustion engines. While there are more than 30 retailers on the Top Tier list, some of the more well-known names are BP, Chevron, Mobil, Shamrock and Texaco.