I air down and then back up a few times a month for 4wheeling then add pressure in the rest when I tow as well. This thing has made it since 2018 since I bought it and still going strong.Iโve used it to inflate a small car tire that was flat and it will heat up a lot if your trying to inflate a tire from very low pressure. But itโs never once failed me and usually itโs just used to air back up from a 4wheeling trip.Cord for my truck is a bit short so I have to plug it in the front outlet for the front two tires then plug it in the backseat for the rear. But for a car that shouldnโt be a problem.Overall this thing owes me nothing since itโs lasted this long. Easily over 200 uses on since 2018 and as of today I had to use it due to the cold temps lowering the pressure and still works as new.Highly recommend for a cheap reliable tool to keep in your vehicle at all times. Also pretty accurate compared to my trucks readout and my hand held gauge. 0.5-1.0 psi off depending what one you believe more lol