Don,t worry too much about ULSD. we have had it for a few years here in UK with out many problems. There were a lot of scare stories of wear in pumps etc, but the fuel companies have added lubricant to the fuel to compensate.
Tighter controls on emmisssions have led to much more efficient engines i.e. more power from less fuel. Look at the CDI Mercs.

Brian

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Brian

1995 E300 Diesel 124T - 210k