gray smoke is the wildcard that could hint at a few issues under your car's hood. It's a bit of a puzzle because gray smoke might appear for various reasons that aren't as clear-cut. Your car ...

During normal operation, the emissions from a car's tailpipe should be invisible ... sign of a major mechanical failure. Thick blue or gray smoke that doesn't dissipate quickly is most likely ...

Blue smoke typically suggests your car is burning oil, grey smoke may indicate oil burning, a faulty turbocharger, or fuel system issues, and black smoke signals excessive fuel consumption.

Blue smoke typically means your car is burning oil, grey smoke may suggest oil burning, a bad turbocharger, or fuel system issues, while black smoke signals excessive fuel consumption. If these ...