An analysis by AAA reveals that gas with detergent additives can keep an engine running smoothlyBy Jeff S. BartlettNot all gasoline is created equal. There’s plain old regular, and then there’s ...

If you’ve been using non -Top Tier gasoline and experience any of these problems, tests have shown that switching to Top Tier gasoline can reduce these symptoms in 1,000 miles of driving.

To research this, AAA went to southern Texas, filled cars with Top Tier and non-Top Tier gasoline, and put them in a lab that simulated 4,000 miles of driving before inspecting the engines for ...

Well, the only good evidence we have so far comes from a study conducted by AAA in 2016. They had an independent lab test new engines using three top tier and three non-top-tier fuels.

SAN FRANCISCO (KGO) -- There seems to be no relief in sight from pain at the pump. The average price of gas in California is now $5.69 a gallon, up 12 cents from Wednesday. Prices are even higher ...

Top Tier gasoline is a fuel standard that includes several additives developed by Audi, BMW, Chrysler, General Motors, Honda, Mercedes-Benz, Toyota, and Volkswagen in 2004.