Andr345 that top line does not make any sense at all.....
I know different oils work differently and I will do a change if it seems to be burning a lot. as I said only had the car a few weeks so time will tell.
Whilst on the subject of oil, whats the best oil for the k20? I don't track my car and rarely hammer it.....
Do you have a receipt for the work, if not there's no proof they serviced it ?