I fitted 225/50/18's to my '15 and they rubbed on the guards like a bastard. I tried moulding the guard using a heat gun but it didn't work and the rubbing at hard lock continued so I got rid of them.
My car has done 120000ks and drives really well. Right from day 1 when I boost it the first couple times there's a fairly decent puff of smoke out the back. The car isn't using oil and it stops doing it after a bit of hot driving.
I looked the problem up a while ago and the concensus was it had...