ive just fitted new wheels to my beemer. ive got 215/35/18 on the front and 225/35/18 on the rear. it did have 205/60/15's all round. its a 1997 323 saloon. my friend said it might affect my fuel guage and id have less fuel than what it reads? any ideas if this is the case on the e36 and if so is there anything i can do other than keeping the tank full???