Unless you chuck Taco Bell bags out your window onto the freeway shoulder daily or dump buckets of coolant in your neighbor's bushes, just driving your car alone is probably the single most polluting ...

To most of us, emission control systems are some sort of "black art" devices that have been forced upon us to rob performance and ruin gas mileage, but that's really not the whole story. Air pollution ...

Stricter emission guidelines are leading to an increase in EVAP-related check engine lights and service opportunities.