Using those estimates for 114 miles:
2.3 to 3 gallons (49.6 - 38 US mpg) (62 - 47.5 Imp mpg)
3 gallons to 3.5 gallons (38 - 32.6 US mpg) (47.5 - 40.7 Imp mpg)
Relative increase with mods 23.4% 'Taking It Easy' and only 14.3% 'Stepping Out'.
For relative increased fun factor it justifies 'Stepping Out' is the way to go or else the 2.3 US gallons was an underfill which I expect may have been the case.
