there are a lot of factors that go into tire pressure..
like style of driving, number of people your car usually carries, the kind of roads, whether diesel/ petrol.
usually if your car carries only 2 passengers, use a slightly more air pressure on the front as this compensates for the engine weight. this gives better handling and good road grip. yes this does result in a very slight drop in mileage...
if you use more air pressure, the surface area for the tire reduces and results in stiffer rides and bad handling... |