There are several differant types of Delo 400. Delo 400 LE is CJ-4+ and has very little zinc, calcium and phosphates. Delo 400 off road 15-40W is CI-4 and has a additive package that's heavy in zinc, calcium and phosphates. CI-4 oil is readily available from any heavy equipment or tractor dealer and I bet soon from the Ford dealers with the new heavy dutys having urea injection instead of DPFs.
Billy