Dave, you surely know that the reason is increasing pollution regulations.

The changes are to protect particulate filters, and of course ESP means "emissions system protection."

I think in the UK there's a company that sells motor oil for classic car owners that believe their's should continue to run on the stuff that was current at the time the car was built, but that's never been the thought in the USA.

Just like fuel and motor oil don't need sulphur, they don't really need the soot producers, either, and oils are just getting better. Don't be tired, be happy.

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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles