I did a test, and the fuel consumption (with the revised software) was 39,79 MPG british (33 MPG US, 0,71 L/10KM), and that is exactly the same as stock.
With the MTM map I hade before, the consumption was 30 MPG british (25 MPG US, 0,93 L/10km) (I hope tha calculation is right)
The speed was...