Went for a drive today, one of the first days this year it has been clear and over 50F. I broke 70mpg on several occasions as per the display, and the tires I have on right now are 1.3% larger than stock, so I may have been over 71 at points.
My last fillup was up by around 9mpg when compared with just 2 months ago. Can't wait to see how it does in high summer!
EDIT: Plus gas is 40% cheaper.