For me, since I have 40 front and 38 rear psi, I would know right away if TPMS didn’t go off..always does when I get a tire rotation..Yeah, I'm curious to know, too. I assume he marked each tire somehow...
Anyways, I’m at 24,591 and 50.7mpg (bought August 21st 2019). I’ve wondering if driving this car a lot (and conservatively) gets you better mpg. One thing I changed is I refill gas whenever I’m close to half a tank to keep tank always close to full (I’ve heard that improves mpg).