My tires look fine so I will check them next week or it is to cold out to fool with them the valve core may freeze. I have heard and made myself almost every excuse there is to prevent checking my tires I have a compressor and heat in my garage so I really have no reason not to check them. If you think your tires look fine, check them, you will be surprised at how low they are. This is a major necessity with low profile tires as they have a lower volume of air. Buy a good tire gauge it doesn’t have to be digital, but they are accurate, and look cool. I use a chuck and gauge combination, easier to use, and check the accuracy once in a awhile with my digital.The valve stem freezing is a rare but possible problem, worse if the compressor you are using has an excess of water either in the lines or the tank. Usually a light tap will unfreeze it. How many pounds of pressure should I put in? On your tire there is a max pressure I go 6 pounds below this in the summer and 8 in the winter, rides to rough with higher pressure in the cold. I would suggest using the factory recommended pressure. There should be a decal either on the glove box door or the driver’s door post. You can go a few pounds higher but stay at least 4 pounds below max more in the summer. Tires can gain as much as 1 pond for every 10 degrees of temp and that is concrete temp not air. Tire pressure is one of the keys to gas mileage.