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 ...

We don't mean to be the harbingers of doom, but it's unwise to keep driving if your car's engine has a malfunctioning positive crankcase ventilation (PCV) system, particularly a bad PCV valve.

A car smelling like burning oil is usually caused by oil leaking onto hot engine parts (like the exhaust manifold) or internal engine failure. Common causes include failed valve cover gaskets, worn ...