[roosterk0031]

Just noticed my highest average came in the Fall with E0, Fall E10 dropped a 1 mpg vs Summer but Fall E0 picked up almost 1 mpg vs Summer making the biggest gap between the two fuels. Looks like my best tank ever was in the fall with E0 at 47.


So last tweak of the spread sheet, removed September and October from E0 and E10 logs, Over 17,000 miles E0 netted 41.29 mpg, over 33,000 E10 netted 39.48. 4.4% loss, not sure what the real % should be, found one source moments ago that gave BTU content of each and it came out to 3.4%, the number I found a long time ago said 3.6% so its somewhere in that range(guessing it came from the North Dakota study).

Also another source stating winter gas is 1.7% lower than summer gas.