I seem to recall that there was a lowering
>of sulphur levels in Diesel fuel some years ago.  It supposedly played hell on
>VW, Volvo, MB, and other automotive Diesel engines because the sulphur was
>acting as a fuel system lubricant (?) and the lack thereof caused injector and
>injector pump failure (at least that's how I remember it).

        SUPPOSEDLY nothing, it in fact trashed many a diesel fuel injection pump.
Two of them belonging to your humble servant.  At the time I had two BMW
524td's, an MB td, and some misc td's.

        Now we add Redline, ATF, or other nice ingredients to diesel to make it
real nice and slicky.

No more problems, two rebuilt pumps later . . .

Merry Christmas
and happy Holidays
HK