I've never managed 32mpg, but then again my feet are quite large and heavy! If I'm good I can get 25mpg from a tankful of optimax/ultimate which combines local trips and short motorway jaunts. Even if I was good I think 30mpg might be atainable, but mine is a Japanese import and has slightly different gearing from the UK versions.
I know that it is possible to get as little as 14mpg, which would be good for anything as sleek as the NSX on the road wearing a prancing horse. But, my 14mpg session was done tearing round bedford autodrome all day. I expect you could half that figure if you took your prancing horse out on the track and drove it hard.
Enjoy it while it lasts ...
Gone but never forgotten ...
'96 Black over Red 3.0 Manual JDM import (09/04 to 10/07)
'06 Grey Audi RS4 Saloon Manual (08/06 to 09/07)
'90 Lotus Carlton (06/05 to 08/06)
'77 Spitfire Mk V (06/87 to 09/89)