AAA Auto Club Says Not All Gasoline Is the Same

Jul 07 2016

Many motorists are clogging their car's engine by not using gasoline with enough added detergents.

That's the conclusion of a study released July 7 by the AAA auto club.

Federal rules in place since 1996 require all gasoline to have some engine-cleaning additives, but many major brands have extra detergents. AAA said tests it commissioned from an independent lab found that lesser gasolines left 19 times more deposits on engine intake valves than TOP TIER fuels after the equivalent of 4,000 miles of driving.

AAA said carbon deposits reduce a car's mileage, increase emissions and hurt performance, especially on newer cars.

AAA's director of automotive engineering, Greg Brannon, said car owners can undo some deposits by switching gasoline for a few thousand miles.

The program to promote higher-detergent fuels grew out of concern by some car makers that the EPA standards for fuel detergents were too weak to prevent buildup that affects car performance. General Motors, Honda, Toyota, BMW, Fiat Chrysler, Mercedes-Benz andVolkswagen are sponsors.

The Michigan-based Center for Quality Assurance runs the program and charges gas stations a fee to use the Top Tier seal of approval. Two executives of the group declined to disclose the fee.

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The full AAA report: http://bit.ly/29mF6tL

List of gasoline retailers that meet auto makers' standards for top-tier fuels:http://www.toptiergas.com/retailers/

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