In article ,
"Al" wrote:

There is also the issue of performance. As I understand it, alcohol
doesn't produce as much horsepower per volume as does avgas. If I use a
mogas that has alcohol in it, I don't have the "Get up and GO" that I used
to have. On that hot day at high altitude, over an obstacle, which takeoff
performance chart do I use?

Today's Wall Street Journal has an chart of pickup trucks and cars and
gas milage with gasoline and E85.
Gas E85 Gas E85 Annual E85 Costs+
City City Hwy HWy Cost /Savings-
Chevy Silverado 1500 AWD 15 11 19 14 $2813 -$10
Chevy Impala 21 16 31 23 $1877 +$40
Chevy Tahoe 1500 AWD 14 11 18 14 $2813 +$223
Ford Crown Victoria 17 12 25 18 $2250 +$353
Ford F150 FFV AWD 14 10 18 13 $3002 +$311

based on 45% highway/55% city, 15,000 mpy