1983 300D oil on piston
hopefully this isn't a double post.
I have apparently 184k miles on a recently bought 300D. It pours out bluish smoke at start up, maybe some whithish mixed in but it's hard to tell.
It bellows out smoke on freeway at full throttle but not really any noticable smoke at constant speed. When i get off the freeway after ~30 miles and idle for a very short time (several seconds) it leaves a smoke trail as seen in rearview mirror and headlights.