I have noticed that due to warmer weather and more Prius C owners that the MPG's are going up. No many in the 40's mpg anymore. I enjoy people posting and obtaining over the EPA of 50 mpg, the 60 mpg figure appears to be fairly easy to obtain with the Prius C. On our Prius the last mpg was 52.3 calculated this is real world driving with my wife driving 75% of the time and she does not drive strictly for MPG's. I believe we should all take a minute and pat ourselves on the back as all the countless gallons of gas we our saving and will be saving for our friends and neighbors who have no choice but perhaps to drive large cars and pickup trucks... One more item, I believe that the U.S. gasoline use is down from years back. I truly believe this can also be due to the countless Prius owners here in the U.S.
Of course it's not just the "C's" ... our '08 managed 58.9 hand-calculated with the last fill-up about 5 days ago and the display is indicating 61.7 after 55 miles driven since then. PS -- the INDICATED mpg from the last tank was 57.3; a bit BELOW the calculated results. Oh; how Mithril enjoys this Cinderella weather! ( Not too hot ... not too cold ... JUST RIGHT!!! )