15 quart.
14qts Rotella T 15W40
15 quarts
There all different it depends on how you take care of it was it maintain the right way or not I have seen diesel engines with over 350,000 miles on them still running like new so it's hard to answer your question We had a powerstroke 7.3L diesel with 425K on the original internals. They replaced it with a 6.0 powerstroke and it dropped a valve at 40K. So you never know.
The 7.3 liter powerstroke diesel has a 15qt oil capacity. When doing an oil change I would recommend putting in 14qt. first, recheck and top off/add as needed, so not to over fill.
12 quarts are needed
2lb 10oz.
12 quarts 15w40
15 quart
12 quarts
The 6.7 L Cummins takes 12 quarts.
First, release the tension on the belt with a 1/2" breakover or ratchet to remove the belt. You don't need a socket, the square part is what is needed, there is a square hole for it. Then simply take a (I believe a 15mm but I know its metric) socket or wrench and unscrew the bolt and the whole thing should come off the front of the engine. Is that engine a turbo-diesel 7.3L Indirect Injected engine? My Dad has a 1993 IDI turbo diesel non-powerstroke that I've worked on many times. Other than the tranny and rear differential, there's not much I haven't had the chance to work on.
10 qts should put you in the middle of the checks