[roosterk0031]

Since I exported my fuel log to a spreadsheet yesterday it's easy to play with, I further narrowed the seasonal windows to remove spring and fall.

Summers (May-August) E10 average 41.75 mpg over 11,213 miles, E0 43.35 of 11,366 miles. 3.7% loss in mpg E0 to E10

Winters (Nov-Feb) E10 averaged 38.06 mpg over 16,198 miles, E0 39.85 over 4,549 miles. 4.4% loss.

Spring (March & April) E10 39.5 over 5981 miles, E0 40.2 over 5232 miles (1.7%)

Fall (Sept & October) E10 40.67 over 8163, E0 44.2 over 6220 miles (8%).

So it seem the other 3 seasons are good at the 4ish percent, but for some reason the fall pulls the overall down to 6%.

Still planning on doing a test this weekend, but it's going to be E0 vs some blend since unless I run it empty I won't be able to get E10 in it. I'll start with about half tank of E0, make the A runs, top off with E85 and make the B runs. Next time I'll start with E10 in the tank, make the B runs with another blend and get 4 points to graph.

Follow that up with second set of A runs the 3rd weekend.