My cars manual states to have 32 PSI all around, however my mechanic said it should be around 40 PSI based on the tires that I have. They‘re performance seasonal tires. I was surprised to hear this so I kept them at 32 but what like to know if anyone else has heard of this or can offer an opinion. Thanks.
Why you would take the advice of a mechanic (few of whom have any tire training at all in tires) over that of the people who spent years and billions of dollars developing your car? You did the right thing by sticking with the vehicle manufacturers recommendation as that will be correct for any tire of any brand or model so long as it is the same size that was originally fitted to the vehicle.
I'm afraid your machanis is right tire pressure changes according to tire size but If you put a tire on a 3000 pound auto you would not use the same tire pressure as putting them on a 4000 pound auto. So here what your gonna do You start with your 32 PSI and drive your car the go up to say 35 and test your car keep on going up until your car car feeling like your riding and then bumps on the road fill like there under yourseat. that tell you that your tires and too full the start letting air out and test drive when you feel your car has a smooth but stable ride that where your tire pressure should be if your in dought let someone who know about car do the test for you. It's just common sense. since changine tire size and height will affect cars in differen't ways I suggest you stick to the factory tire and if at all possible the brand name recommend for that vehicle. That way you can't use tire pressure recommended by the vehicle manual.
There ARE some tires which require higher inflation than the usual 32# that's been the standard for some decades. I myself was kinda surprised at seeing some tires are set for 35# rather than 32#. But they're larger ones for bigger SUVs. so there may be something to what the guy told you. YOu didn't tell us the kind or size of tires. You should USUALLY keep your tires at 32 for best use. If you're travelling, it's better to keep them about 36, because the slightly higher pressure will make tire rise slightly, so not as much tire will be on the road, and thusly there's less friction, which reduces rolling ability, thereby increasing mpg a bit. If you've ever ridden a bicycle with low tires, it's pretty hard to do. But air it up, so it's got strong tires, and it rolls so much cleanr and easier, and its same thing with a car. Only penalty is that the tires are stiffer and then you feel the bumps so much more. Yuck. Waht you can do to check these tires out. Choose OK tires, or Discount tires, some big tire chain you know, go online to their website. They usually have place to check out tires, and in the info, it will tell youwhat you should set the pressure at. Also consider going to the website of the brand of tires. then you can see what they suggest. 40# sounds pretty high, but if it's that much a specialty tire, you might need it. I'm thinking if they're really thin tires, or tires on really extra big rims, where there's not much tire at all, you might need the extra pressure to help provide the support that would normally be done by the extra rubber.
