I would advise to run 97+ Octane once you have had a remap, just alot safer and will give better results.

Fuel economy wise if you drive the car sensibly then the MPG should go up after the remap, obviously with your foot down everywhere its not but under normal conditions it will improve.

You dont really need to do any mods before the remap, you will still pick up a fair bit of power with just the map.

We still have 2 places left at £250.. you guys havnt exactly snapped them up! lol