well, i am about half way through my tank of fuel and turned off the ActiveECO...it may shave a few tenths of fuel consumption off, but i find it a little "annoying" in my commute...sometimes, you need to give it a little to change lanes, etc, and driving 60 km/hr in 6th gear is likely good for fuel economy, but forces you to mash the pedal to kick it down to 3rd or 4th in order to actually pull away without feeling like you are on a bicycle...the car behaves and drives much better with it off...the fact it isn't a Turbo also probably has something to do with it.