I have a 1987 90 with a 2.5 turbodiesel engine. On early morning starts the exhaust shows a moderate amount of (what looks like) oil smoke. The exhaust clears after a short while and remains clear under all types of driving, which I think might exclude the turbo from being the root cause. Warm starts only show a very small puff of whitish smoke which clears very quickly. Oil consumption is what you might expect from a well cared for older engine - that is some but not lots.
Not being a long time owner I don't know what is "normal". Any ideas of the cause would be greatly appreciated.
Russ