For those whove had their Clios modded with superchip/unichip etc, have you noticed a significant change in fuel consumption? Im debating as to whether to go for an ECU upgrade but if it means poor economy for little gain, I dont think Ill go for it.
Currently I get about 250 miles from a full tank of normal in town to fast driving on A roads. I never drive it till its virtually empty and my fillups are usually £28 of optimax which equates to about 35ltrs.