Hi, new member here and hoping to get some help. I have an 2008 IS250 AWD and am looking to go with bigger wheels and tires. Thinking of 18" wheels and slightly bigger tires than the stock ones (to reduce the space in the wheel well.) Will this really damage the AWD system or throw my odometer off by a lot? The guys at Town Fair tire said it would not harm the AWD system. Any reccomendations or suggestions for wheel and tire configurations/ sizes would be greatly appreciated.