Kompressor,
The new oil is API Rated, CJ-4. It is designed for the new diesels that will have to use ULSD & have all kinds of emissions equipment, on them, like particulate traps, EGR valves, Catalytic Convertors, etc. Those engines HAVE to use the new oils because they have much less sulphur, etc. , in them. The new oils are "backwards compatible", which means that they can be used in older diesels, also. The CJ-4 may be all that you will be able to fine, easily, now.
I just bought a case ( 6 gallon jugs, enough for two oil changes) of Chevron Delo-400, 15X40, CI-4+, at Costco for $54. 29, to give you an idea of what oil costs if you do the oil changes, yourself.
The dealer may have included a fuel filter change, in that price. Some of the dealers are getting over $100. 00 for that change. I, recently, paid $16. 65 for the FS 19800-E (7 micron) fuel filter at Cummins Rocky Mountain, here in Phoenix. And, I think I may have overpaid, for it. At any rate, learn how to change the fuel filter, yourself. It's quite easy & you can save yourself a lot of money. Besides, if you are on the road & plug a filter, you can change it on the side of the road & be on your way, again. No tow truck & dealer costs. If your old filter isn't plugged-up completely, save it & keep it in your truck & if you get a load of bad (dirty) fuel, stick the old filter in til it gets plugged & then install a new one.
BTW, the LF-16035 (oil filter) was $14. 28.
You can probably find them even cheaper.
Joe F. (Buffalo)