Hi, i have had my ST3 for 16 months now, great cars and drive well.

MPG - I do allot of motorway miles 25k per year and TBH i think its crap! i dont run the engine flat but drive at 80mph average i would say, Mine shows 26.4 since birth as only re set the computer the day i bought it.

My mate has the montune and it shows he is getting 27 MPG which i have heard others say.