Don't forget you will a lower mpg in the winter. My 2 litre petrol Focus is 7mg down now on what it gave me in August on like-for-like driving. 30 instead of 37.

Despite looking for one, and keeping careful measurements, I have never been able to convincingly prove worse consumption in winter with my Peugeot diesels. Two or three mpg at most. But I suppose my driving habits are not typical.

Many thanks for the feedback, ideas and discussion.

I didn't notice a big difference between winter and summer on my previous Fiesta Diesels, although at the last count mine is now only achieving 37 mpg and when I took it to the dealer in January it was returning 39.5 mpg.

The car had done 9,500 miles when I bought it so should have loosened up by now hopefully.

This article on the AA site
https://www.theaa.com/motoring_advice/fuels-and-environment/official-fuel-consumption-figures.html
makes interesting reading, including suggestions that figures are now on average 21% lower than claimed. However mine is running at 44% lower so I consider that to be a whole other ball game!

Given Ford's press release regarding their new Econetic models (see here:
http://green.autoblog.com/2012/03/27/new-ford-fiesta-econetic-gets-71-mpg-in-europe/
and click the Press Release button) I would certainly have expected to at least achieve the same mpg as on my previous models, and not more than 20% less I used to get a regular 50mpg from my 1.4 TDCI for instance.

My own observation is that this model warms up much more slowly than all the previous ones I have owned and is probably not reaching efficient operating temperature, but then shouldn't that be reflected in the urban cycle test figures which are higher than quoted for all my previous models?

I stand corrected , I believed the HC ran from 1971 to 79, from J reg to V reg and they were awful!!! I was forgetting what age I was for a moment Thunderbird , The Ford Sierra I think came out in 1982, a 1.6 base or standard pumped out 75bhp and did about 103 mph and not terribly great on petrol, compare that to my 2013 Mondeo 2.0 Tdci pushing out 163 bhp and 137mph combined with fantastic fuel economy , I think progress has been amazing in automotive circles

I used to get 30mpg, just, from a '72 1.1 Escort mk1 which spent much of it's life at an indicated 80+ on the M6/M74 and A94/A92 between NE Scotland and the Midlands.

Thst would be a Vauxhall Viva HB with an even more underpowered 1159cc engine and bodywork so thin tinfoil was thicker than most of the panels

do you have the 'live' mpg reading on your car? i use it on my fiesta econetic and get around 70 out of it - found if you slighly press the pedal further down it drinks like a fish. its about how you drive it if that makes sense.