OK, about 200 miles into my first full tank of B100. Last tank was 50/50 of 'whatever the last guy had' and B100. Also did a Purge (just one bottle) and replaced fuel filters. I should note, I replaced the filters before the purge. It's got about 259K on it - all old diesel, no B100 or anything every put in it before.

Still I have some smoke. Usually very minimal white smoke, at start up, or from a standing start. At night a little more obvious. Its not belching huge clouds, except if I jump on the pedal to help it start (it seems to not start super easy if I am parked on a slope, engine upslope). Anyway, my mechanic, a very good mechanic (Enrique at Mr. MB in Tarzana) said not to be bothered by it.

Is this normal? Should I keep running the B100 to see if it clears? And, what is in the smoke if its B100? Smoke still smells like 'diesel' too.

If after 500 miles of B100, and new filters again, and there is still smoke, what else can I look into? Injectors?

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1979 300TD wagon (non-turbo)
266,000+