Bror,
I don't work for Shell so I can't really tell ya. I don't see though where it was a diesel related issue as the "old" stuff had earned all the manufacturer and foreign specifications/approvals.
Economics are the bottom line and that's the only thing I can think of...
Yeah, the "old" stuff looked good on paper, but the "new" stuff seems to be performing just as well, if not better in some aspects (in regards to oil consumption) than the old formulation.
I'm darn sure that I got the new formula because the Long-Life I picked up the other day is significantly lighter in color than the previous Long-Life I've picked up.
For reference, I used some Pennzoil 10w-30 the other day and it's about the same color as the old Long-Life - deep, dark brown. Kinda throws you off pouring NEW dark oil into an engine!
[ July 08, 2004, 02:06 PM: Message edited by: Jelly ]