Good points, however, my understanding was that:

1. Should use thinnest oil recommended by manufacturer
2. Because newer engines have lower tension rings, are built to closer tolerances, etc.

__________________
George Stephenson
1991 350 SDL (200K and she ain't bent, yet)
former 2002 E320 4Matic Wagon - good car
former 1985 300 CD - great car
former 1981 300 TD - good car
former 1972 280 SEL - not so good car
a couple of those diesel Rabbits ...40-45 mpg