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 . ...

If you use low-quality gas without extra fuel additives and detergents, your fuel system and injectors will get dirty. Here’s how they work.

Fuel injector cleaners are additives that are poured right into the gas tank and remove carbon deposits and other contaminants from the injectors. This can lead to better fuel economy, improved ...

The central truism regarding any fuel additive is that sometimes you need it—and sometimes you don’t. Aside from the untold legions of snake oil substances touted to improve fuel economy, there are ...

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 ...

SACRAMENTO — Concerned that California could face gasoline shortages by year’s end, Gov. Gray Davis said Thursday he is considering delaying a ban on the gasoline additive MTBE, a substance that has ...

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 ...

Last month, the Environmental Protection Agency announced plans to phase down, and perhaps out, use of a suspected carcinogen that refiners have added to gasoline since the 1970s. An octane booster, ...