Cool, id have kept breaking my car to get that! but knowing my luck id end up with a micra.
37 miles? what on earth were they doing to it? i wouldnt have thought that fitting a new ECU and A/C fix would warrant such a long drive! Even when i worked for a subaru garage i took them to "dry them off", but less than a mile, just the long route back to the garage (about 1/2 mile, albeit at a healthy speed)
Id thrash the car because its annoying having your nice new car in the garage so early after youve bought it. You paid for a 172 you want 172 performance, not courtesy non-virginal boat performance. Just think, someone else has broken in your baby. Id be fuming. Ah well, at least the 172s respond well to thrashing instead of running in properly. Theyve probably done you a favour!