Depending on which way you're headed, just south of Phoenix on the way Casa Grande is a Speedco. They're usually easy in and out oil changes in 45 min to an hour with no appointments. Check their web site for others that may be closer to you. I used one north west of Phoenix someplace a couple of months ago while the DW wanted to grocery shop. Quick and easy in and out. Cost was $204 for filters and oil and both fuel filters on a Cat C7.
Bill
Nodwell RN110 out moose hunting. 4-53 Detroit, Clark 5 spd, 40" wide tracks, 10:00x20 tires, 16,000# capacity, 22,000# weight. You know the mud is getting deep when it's coming in the doors.
