Thanks for the insights. Yes, I changed the filters out after a couple of tanks of the B100. I haven't checked in the last few days, but didn't think that was the issue due to the dino fuel having more power. I am not driving that much these days, anyway, so I think I'll go to B20 with the remaining stock and wait until Spring to debug further.

Even with dino, it still doesn't have THAT much power. But then that's another issue.

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1987 300SDL 265,000 mi.
1982 300SD 325,000 mi. (and holding)
1956 Packard Clipper 150,000 mi.