E90 M3 Saloon to C63 AMG Estate - mpg

[Fabster]

So thinking about switching to a c63 estate - need a bit more space. The m3 saloon is almost perfect as the family wheels - but the boot is just a bit of a squeeze. So trying to cut thru the mpg crap. I get about 21 out of the m3 - anyone got an average long term cycle on a c63? Fom what I've googled they either seem unbelievably high or stupidly low. I don't do city driving (that's what the cab/train/tube is for!) - but A roads and motorways.... If It averages around 20 I'm happy... Though to be fair this v8 malarkey is getting a tad expensive!
Ta

[matc]

A friend of mine as just picked up a saloon with about 50k on the clock and the fuel computer's never been reset; it was showing an average of 19.6mpg so pretty good IMO and about as real world example as you're going to get.

[Aeroresh]

matc said:

A friend of mine as just picked up a saloon with about 50k on the clock and the fuel computer's never been reset; it was showing an average of 19.6mpg so pretty good IMO and about as real world example as you're going to get.

Only if you can believe what the computer tells you....both my ml and e class overread by 2-3 mpg over actual brim to brim measurements.

[Phooey]

1150 miles and 17.5 mpg here. 20-22 easily poss on an A/B road journey if left in 'comfort' and driven with respect..

Now, tyre wear is another topic