“The most important thing about the report is that many of the nation’s giants of gas discounting sell Top Tier gasoline, including Costco and QuikTrip,” Clark said. Such carbon deposits are known to reduce fuel economy, increase emissions and negatively impact vehicle performance, particularly on newer vehicles.”Įvery service station that sells Top Tier fuel must add the detergent package to all grades of gasoline.Īccording to AAA, Top Tier gasoline costs an average of three cents more per gallon, but money expert Clark Howard says it doesn’t have to be more expensive. “Among brands tested, non-Top Tier gasolines caused 19 times more engine deposits than Top Tier brands after just 4,000 miles of simulated driving.
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The group is now urging drivers to use a gasoline that meets Top Tier standards for engine cleanliness and performance. To be considered Top Tier, the gasoline must have a higher concentration of detergent added to it.ĪAA said it was surprised to find that detergent additives made such an impact on gasoline quality. Since the 1990s, the Environmental Protection Agency has required a minimum level of detergent for all gas sold, but some automakers believe the EPA standards aren’t good enough. Top Tier Gas: These Are the Best Gas Stations, AAA Says The group’s researchers found “significant” differences in the quality of gasoline sold across the country. When you’re deciding where to pull over for gas, do you look for the Top Tier logo? Maybe you should start!Įngine-cleaning detergent additives in gasoline really do make a difference and are worth the extra price to keep your car healthy, according to independent laboratory testing from AAA.
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