These 67 gas stations sell Top Tier fuel Popular brands such as Chevron, Mobil, Shell, and Texaco all sell the enhanced fuel.
Top Tier fuels feature more of these additives than regular gas. In 1995 the Environmental ... it also must be sold at all of a fuel marketer’s stations and across all grades of its gasoline ...
Factors like brand reputation, fuel quality (Top Tier gas), and local taxes can also contribute to price differences. While gas stations once competed in "gas wars," today, profits are driven more by ...