Oh, I realize I should have mentioned... the 2009 "best 4 tanks" as well as the "pre-'guino tanks" were all done using my surface commute route, which generally allowed me to get better FE than commuting by freeway. Since getting the 'guino, I determined that while I get better FE taking the surface route, I still use less fuel overall taking the freeway route since the distance is a bit shorter by freeway.
So while it's not quite an apples - to - apples comparison (it is "sort of" since they're all sets of commuting tanks, just not identical routes), the fact that I'm taking a less FE-friendly route further highlights how much of an impact the 'guino had in improving my FE.
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