I've been using it as a substitute for (BMW) LL-04 oil for several years in my X5 35d. The LL04 oil had unsatisfactory TBN retention and acid buildup at factory OCIs, the D1 LE is superior. It has C3 levels of P and Zn but it is bit higher in ash (1.0% vs. 0.8%). But the engine consumes zero oil at 11000 mi OCIs.
I got my initial stash from a distributor in the UK, haven't finished it yet.
BTW I get Delvac 1 SHC 5W40 (supposedly a marine product in the US) from my local Mobil distributor.
Charlie