Fuel

[RetroPug]

71mpg from your DV6?  I know the Fiesta must be lighter but still that's ridiculous.  Have you actually brim tested it yet?

Lifetime average on the gauge was 71.5 until I reset it. Now been driving more "normally" and got 58.something to a tank.

No I haven't measured MPG by brimming the tank, but to get that figure I've been very deliberately driving as economically as possible. The gauge might be out a bit but surely not by a huge amount.

So, not exceeding 55mph, holding as constant a speed as possible, backing off from drivers in front so that I can coast down, using downhills to accelerate so that I can coast up the 2nd half of an uphill bit, accelerating very slowly, always coasting down instead of using brakes, etc. I'm a vehicle test and development engineer for a living, part of which is fuel economy testing but I haven't done much of that at all. That technique has mostly been refined since owning the fiesta and seeing what works and what doesn't.

I reckon driving in the same way would yield good MPG from the focus. I've tried driving economically with various other vehicles, albeit briefly and got good MPG figures with them as well.