60+mpg is doable, even in the F-Sport. I have a 20 mile commute, back country roads and towns which allows me to use EV quite a bit due to 30mph and 40mph limits.
I have reached 63mpg a couple of times, and often average around 55mpg. Longer journeys, cruising on motorways will return 45-55 quite easily.
Keep challenging yourself, the mpg will increase.