Drove from Hastings to Aldershot then to Sedbergh on half a tank doing about 70 to 80 most of the way. will it be that good with a remap?

Yep. I've been on a few long runs recently.

60.4

62.8

61.5

All calculated using brim-to-brim method and just sat at 70mph on cruise pretty much all of the way.

http://www.fuelly.co...scoop/fabia-vrs

Got 63mpg driving back from Weston yesterday (65 miles), mostly motorway but had to detour through Clevedon & Bristol. Was doing a constant 65mph on the motorway (GPS speed). And that is with 200bhp! (Hybrid turbo & map).