I have a 17 plate A7 3.0 TDI (272) motorway was getting 40 to 45mpg on local roads closer to 25 to 30mpg. Had a stage 1 mid map (320bhp) now getting 30 all day long on local roads but motorway now sitting at a comfy 50 to 55mpg driving at 65 to 75. Extra oomph is a bonus when needed.