There's a lot going on inside your vehicle at any given time, whether you're idling at a red light or driving at freeway speeds. Much of this activity involves chemical reactions that — while ...

The title says it all. 2000 Audi A6 Avant. When the heat is going and pulling fresh air in, after 5 or so minutes of the car running I start smelling exhaust in the cabin. If I put it on recirculate ...

Toyota engineers have worked hard to get the emissions that come out of the tailpipe of the Prius V down to a low level, but that doesn’t mean everything is copacetic with the car’s exhaust system. To ...

Drivers tend to ignore the exhaust pipe until something dramatic happens. A sudden change in exhaust smoke forces attention fast. Color, thickness, and even smell can signal hidden engine problems ...