Are some gasolines better than others? What is "Top Tier Detergent Gasoline"?

In general, Honda recommends that you buy gasoline from high-volume, major name-brand stations.


To prevent the build up of deposits inside your engine and fuel system, it is important to choose fuels that contain effective detergent additives. The detergency of some US gasolines is insufficient to provide protection from such deposits. Honda recommends the use of "Top Tier Detergent Gasolines," where available. Gasoline brands with this designation meet new, voluntary standards and have demonstrated their ability to keep engines clean through a series of demanding tests. Significantly, Top Tier Detergent Gasoline does not contain MMT, a metallic additive that creates deposits in your engine and exhaust system; (see the MMT explanation below). Fuel brands that have achieved the Top Tier Detergent Gasoline designation can be identified through their marketing campaigns, and/or by fueling station signage.