Recommended tire pressure in my wife’s Honda Fit: 32 PSI.
Actual tire pressure, almost 2 months after the car was at the dealership where they rotated tires and adjusted pressure, with no intervention from me ever since: 40, 32, 35, 37 PSI. Measured at cold (not driven for a day).
Given that we’ve seen the tires slowly lose pressure in her vehicle (dropping from 32 to 25 in about a month, thus triggering the onboard sensor several times in the past), makes me wonder how much air they’ve put on Feb 16th.
Autopark Honda, I’m watching you.
Yeah, they do know best how to use your vehicle to extract money from you
However, all tires lose air, very slowly, but they all do. So even with brand-new tires on a car it would not be unusual to see the pressures go down 1-2 psi over a couple of weeks. If you’re lucky, they will lose equal amounts of pressure resulting in no negative impact on handling.
There was a massive recall of made-in-China rubber valve stems due to excessive air loss–you may want to check with whoever mounted the tires on the Fit to see if your wife’s got some of those defective stems on her car.
But just to be sure, I would say check your tires once every 2-3 weeks, maybe even once a month, but no rarer. You can get a cheap air compressor and make sure you always have optimal pressure in your tires.