Car behaves the same on any grade of gasoline, only needs about 87 PON not to knock in summer
Hot vs cold difference with E-85 ethanol: I did not get enough added intake air preheat
Volumetric heating value says I should have gotten 17, not 18 to 20, mpg vs gasoline 24
on the short commute cycle
Instead I got 18 mpg cold (20 F) which is factor 1.04 better than it should have been
and I got 20 mpg warm (60+F) which is factor 1.18 better than it should have been
The lower performance in cold weather was associated with hesitation problems,
indicating bad vaporization
