Depends very much on how and what sort of driving you do. On a gentle long run my XFR (same engine) but slightly heavier car will do up to 30+ mpg. Short runs or a heavier foot and it is nearer 20. It has been mapped which I have found improved mpg
To be honest I was thinking of doing a hard reset by removing the positive terminal from the battery for half an hour. More than once on my previous car this appears to reset the dynamics of the car. It has spent 5 months being a demonstrator, I bet they weren't all 80 year old grannies with eggshell feet!
Hi AMH77, Your car purchase is similar to mine I Bought from stratstone with 2k on the clock and now has 6k on it.
As I said im getting 21 avg, Last month my car was in for a recall on the "battery drain" and required the battery disconnecting and I have since noticed no difference in trip comp reading.you could try it but I dont see it making any difference.