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 . ...

Gasoline additives ensure that a car's engine runs properly. Otherwise, the engine will knock – and you'll be knocking on your mechanic's door holding a whole bunch of your favorite dollars. But ...

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 ...

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 ...

The state of California has sued the federal Environmental Protection Agency, arguing that it overlooked scientific evidence that California gasoline does not need expensive anti-pollution additives ...

Peel the lobbyist-encrusted layers off the "gasoline additive" debate, and you have one of the most complex, convoluted and economically destructive examples of pork-barrel politics ever concocted.

With gas prices at record high levels statewide, drivers may be tempted to buy gasoline additives that claim to improve vehicle mileage. The Automobile Club of Southern California is advising ...