Having just bought my Z4M as a somewhat impulse purchase, I noticed that the service history includes the running in service at a main dealer, then an oil service carried out at a normal independant garage (ie. not even BMW specialist, I think it might have been the lease company that owned the vehicle) at about 10k miles back in March - do you think this is a bad thing that the oil service was carried out by a non-franchised dealer, or is it a basic change that anyone can do and shouldn't affect re-sale?