AAA recommends using automaker-backed TopTier fuel
After doing its own new testing, the American Automobile Association now recommends that drivers use gasoline that meets Top Tier standards for engine cleanliness and performance.
The independent lab found that non-Top Tier gas caused 19 times more engine deposits than Top Tier brands after just 4,000 miles of simulated driving. Such carbon deposits are known to reduce fuel economy, increase emissions and hurt vehicle performance, particularly on newer vehicles. Top Tier is an automaker-backed program.
AAA was surprised to learn the extent to which detergent additives [in Top Tier fuel brands] impact gasoline quality, said John Nielsen, AAAês managing director of automotive engineering and repair.
Even though two-thirds of U.S. drivers believe there is a difference in quality of gasoline sold by different gas stations, a AAA survey shows that Americans value convenience and price over quality when choosing a gas station.Download Bulletin PDF