Italian electrics maybe ? on a proper run (150 miles) I was pleasantly surprised to see 26 mpg !
I have never got more than 22-23 so no idea how you getting 34! (BTW that's not necessarily something to boast about round here though!)
Eb
How would I check? (short of converting litres to gallons and doing the whole thing manually between refills!) Don't recall anywhere you can set this.
Eb
No idea on the QP, but on the 4200 and the GT there's an option for units buried in one of the overall settings menus....
C