I accidentally left my Mazda 6 running overnight for 16 hours the other day. I got home from work, turned the A/C off, and left car running when I went inside
7k intervals aren't "hard" on the engine. The normal interval per the manual is 7500 mi or 5k for the the severe driving schedule. For the 2026 CX5, normal is 10k mi now. In Europe the interval is 12,400 mi (20k km)
The currently available Idemitsu oil is not the high moly oil that was available a few years ago. They stopped making that one for commercial sale for some reason. The factory fill on 2.5 NA engines is still Idemitsu high moly. Mazda dealers do have a new Idemitsu high moly GF6a oil by the quart...