2012
Waiting impatiently for some results... so went and found this:
Vetter, 69, continues to innovate | Mansfield News Journal | mansfieldnewsjournal.com
Fred Hayes' diesel is the winner at 2.4 cents/mile (last year 2.57 cents/mile). Don't know if he improved fe or if diesel fuel was a little cheaper this year...
P.S. At internet search price of $3.49/g, that would be 145 mpg.