Didn't change much for me, I just look at how many miles I get from a tank - before about 300 miles then I'd fill up (20 miles left on display but it does seem to drop rapidly when you get into the red!) now I get to around 280 with 20 left on display and I fill up! So not a massive difference but I did have the remap done early on after only a couple of thousand miles and I was quite kind to it then as I 'ran it in'. Now I boot it regularly!

I do mostly short journeys and town driving so my MPG is quite low anyway, rarely get above 26MPG.
