The AA has explained the most common reasons for white or blue smoke coming from a car exhaust, and advice on what to do if it happens. While white smoke coming from your exhaust could be due to ...

Billowing blue smoke from a car typically indicates oil burning in the combustion chamber. Unlike white smoke, which is often related to coolant, blue smoke signals an issue with engine oil.

Thick blue or gray smoke that doesn't dissipate quickly ... If your engine is burning enough oil to produce visible exhaust smoke, the oil level will drop over time and require periodic top ...