Long journeys I can get 400 miles out of a tank (consistent motorway driving with no traffic... very unusual) but typically 260 miles from the tank... thats with Aircon on and spirited driving short distances to work and back
I have a panel filter, sports cat and twin exit XPower exhaust and Brembo's.... no idea if the mods make any difference to Fuel economy
On the other hand... my Bike does 300 miles to ?10 of fuel
just can't take both kids out on it at the same time! lol