Which best way to inflate tire, do it your self using machine or self inflate machine or inflator, or ask the mechanic do to it? Is it true not to set all 4 tires same PSI, like front tire less psi?
you inflate you tire when they are cold and psi is the same for all four tires or look in the hand book you got with your car
When inflating a vehicles tires, you should always use a tire pressure gauge so that you can accurately keep all 4 tires within the correct pressure range. As far as keeping all 4 tires the same psi, normally this is what is recommended for regular every day driving. Check the door jam of your car to see what tire pressure is recommended. The only time you wouldn't want to run maximum tire pressure is when you're drag racing, as a lower tire pressure provides you with a larger contact patch, which in turn provides more traction.
Use any of the ways that you have described and all tires should be at the same pressure unless otherwise stated in your owners manual. With the right amount of air pressure, your tires wear longer, save fuel, enhance handling, and prevent accidents. Failure to maintain the correct air pressure can result in poor gas mileage, loss of tire life, bad handling, possible loss of control, and potential vehicle overloading. If you consider these liabilities, then the need to routinely add air to your tires will become even clearer. The correct air pressure may be found in the vehicle owner's manual or on the tire placard (attached to the vehicle door edge, doorpost, glove box door or fuel door). The placard tells you the maximum vehicle load, the cold tire pressures and the tire size recommended by the vehicle manufacturer. When checking your vehicle's tire pressure, make sure the tires are cold. Cold air pressure means that the vehicle has not yet been driven one mile. Remember that driving on a tire increases its temperature and air pressure. If you must drive more than one mile for air, check and record the air pressure in all your tires before you leave. Once at the tire dealer, measure each tire's inflation again and then note the difference. Inflate the tires with low pressure to a level that is equal to the recommended cold pressure plus the difference at the higher temperature.
