Drivers reach for gas additives with the hope of squeezing more life, efficiency, or power out of an engine. The pitch sounds simple: pour in a small bottle, drive, and let chemistry work things out.

Premium gas doesn't provide any more power or contain better additives than regular gas, and it contains the same amount of ethanol as other grades. It just resists detonation (knock) better than ...

Gasoline companies have been pushing engine-cleaning formulations lately. Setting aside the benefits for my car, are these additives good for the environment? Gasoline is a complex mixture of, well . ...

Have pings got you down? Has driving your car become a pain in the gas? Are your exhaust valves being "lead" astray? Well, as promised in last month's "Living With Unleaded," article, have we got some ...

It’s a colorless liquid with an agreeable odor. But it’s posing a danger that could put California’s 21 million drivers in a very disagreeable mood in the coming months. The liquid is ethanol and, as ...

The Environmental Protection Agency ordered three populous states — California, New York and Connecticut — to continue using air pollution-reducing gasoline additives. The decision Thursday helps the ...

CHICAGO — The gasoline additive MTBE, which has been blamed for contaminating ground water, is turning up in fuel supplies in states where it is not required, a researcher said Thursday. Reynaldo D.

FINDLAY, Ohio -- Marathon Petroleum Co. LLC, The Armor All/STP Products Co. and Afton Chemical Corp. have agreed to introduce STP branded gasoline performance additives to the Marathon-branded retail ...

CONCORD, N.H. (AP) — A former Exxon Mobile engineer testified Monday that environmental hazards surrounding the gasoline additive MTBE were widely discussed in water quality and oil industry circles ...

House and Senate negotiators removed a major obstacle that had deadlocked energy legislation for more than two years, but even supporters say the measure will not provide short-term relief from high ...

TAMPA, Fla. — Florida is allowing for winter-grade gasoline to be sold for a limited time to lower fuel costs after issuing ...