<sigh> ... Unfortunately, a very bad tank for me this time... only ~52mpg, causing me to drop down to #9 (
). My explanation is that I could not drive Helga for most of the tank, so it was my wife that drove instead... she is not as good at getting the best FE out of Helga... instead, she enjoys the power of the turbo!
Also combined with that, we had some of the hottest days I've experienced here in a long time... some nights the coolest temperature was 80 °F (~27 °C)! And highs at about 110 °F (~43 °C). This might be normal in Arizona, but not so much here... it meant that with my wife driving, AC was on nearly all the time!
I suppose, even with all that, it's amazing to get such high FE... my gasoline turbo Roo would get 21mpg at best under similar conditions.
Enough of the excuses; next tank I hope to do better and begin climbing back up to my previous position!