My CX5 (diesel) is now almost three years old. Normally I have the info gauge at the extreme right switched to "Range" but out of interest, I recently changed this to "Fuel Economy". It currently reads 53.7mpg which I'm quite happy with but I note that after about four weeks of driving, the figure hasn't changed at all! Perhaps I'm just a steady driver but I wonder if anybody has seen this figure go up (in which case, what were they doing, eg accelerating, changing gear...) or go down (in which case, what were they doing, eg , over-revving, braking...)