As Bret said likely to be a blown head gasket. Light colored smoke out the exhaust is normal until the engine warms up, especially noticeable on cold mornings dense air. Blueish/gray smoke is a sign an engine is "burning oil", excessive black smoke would be a sign an engine is running to rich/too much fuel is entering the engine. White steam perhaps noticed with a slightly sweet odor from the exhaust, rough engine running, over heating and or coolant loss would be a sign of a blown or mildly blown head gasket.
Hi Patrick ! I just noticed that my car ( vw passat 1.9 tdi 1998 ) is starting to realease blueish/gray smoke how can i repair it because i saw the this is a sign that the engine is burning oil. i also just refilled the steering oil cuz it drawn. Is this maybe a sign that the steering oil has a lack and the engine is burning that oil ?