If you're not doing constant short trips, a once a year OCI if the mileage requirement isnt' met would be fine. Most car makers these days say you can go up to 1 year OCIs if the mileage is below their OCI requirment. Plus you are in AZ which isn't very humid, which is a plus for extending OCIs because there will be less possibility of water contamination from combustion in the oil.For my truck, (1991 Ford F-150 5.0 V-8), I use Mobil 1 High Mileage Full Synthetic 10W-40.
For my Jeep, (2015 Jeep Grand Cherokee 5.7 HEMI V-8), I use Pennzoil Platinum Full Synthetic 5W-20.
For my Toyota, (2018 Toyota Camry 2.5, 4-Cylinder), I use Mobil 1 Full Synthetic 0W-30).
I change oil and filter every 6 months, regardless of mileage. (Probably too often).