1.6 FSI - Fuel Consumption/Economy 'Device' Remap/Tune
As title I would appreciate if anybody could help me with a remap (if called) for fuel consumption/economy gain.
As its a 1.6 I'm not really looking to gain any Power/BHP and really care more about my MPG's lol, as I'm a student. Currently with really careful driving the 1.6 is returning about 38-42 MPG (summer seems to be more). I have never done any sort of ECU Remapping and have no idea how to perform a Eco Tune (I'm in London btw).
I have seen a couple of "Devices" (Sorry no idea what they call it) > Link that claim to increase fuel economy!
Could anybody give me more details probably a link too, on which one of these 'Devices' are best to use and whether it is safe, also do these really increase MPG?