Back in 2004, several automakers got together to create a more pure form of gasoline to meet strict standards set by the U.S. Environmental Protection Agency (EPA), now known as Top Tier gasoline.

DENVER — Specific gas stations operated by King Soopers, Murphy Express and Costco will need to have their unleaded fuel tanks and pumps cleaned before customers can gas up again. At least a dozen ...

For some, riding a motorcycle down a wide open freeway is pretty much the epitome of freedom. We're certainly not here to rail against the unbridled majesty that purportedly accompanies charging down ...

The presence of water or other fluid mixed with diesel fuel is clearly apparent from the stratification shown here. Diesel fuel is generally very clean when it leaves the refinery. But it can pick up ...