Well, that answers that . . . and as most suspected. Thanks.
The problem is that most blends can change throughout the year. What would happen if you were caught between changes? Say from 2% ethanol to 10% ethanol. Summer to winter. I know here in Arizona we change the blend from Winter to Summer, and back again. All that aside, your testing was pretty much done at the same time of year - and makes sense.
(By the way, my wife LOVES her new Cherokee - huge bang-for-the-buck and dealers are selling them VERY fast!) Love these Italian cars made in Detroit.