My FE Diesel AWD is pulling (reliably) 34mpg on a mix of city/motorway driving.
If I do long M-Way journeys staying at 70 and not too many hills I can easilly hit 40mpg but as soon as your up against hills, stop start city driving or even just nipping to the shops then it'll drop to 30.
90mph on the motorway and it'll only be doing 34mpg and even less going up hills!
Compre with the 47mpg combined as per the manual and you kind of get what I'm talking about.
Slim