Taken the plunge with DTUK

Personally I think this is only possible in 'laboratory conditions'. 

 

Just like car manufacturers official fuel consumption figures. They are never really what they are claimed to be, but always lower.

 

I get the logic behind that with car tuning... if you have more power/torque, you need less of those to move the car around, therefore you will spend less fuel (if you try to drive carefully), but then again, I think technically only possible on paper.

 

Personally, since I have been using the box, my consumption has risen by about 1L/100km on average, but considering power increase and more importantly awesome feeling when pushing the car, I am completely fine with that :P