TurboTravis,
I didn’t measure my ethanol content % before getting my tune in March, but now after reading some of your measurements, I’m thinking I am wrong to assume it was E70 in March. I was under the impression that this region dispensed E70 in the winter, E85 in the summer…and the times in between were somewhere between the two (in other words, there was only a 15% range). From what you’ve analyzed, it sounds like you’ve seen a seasonal range of more like 30%…which makes me wonder if I was pumping ethanol in the 60’s.
I did a few datalogs now and see that my fuel trims are adding some fuel to avoid going lean, so I’m working with my tuner to get things back in line. Make sense I might be seeing the trim situation I have if my original tune was on E65 and I’m pumping E80 now @ RT 7 Mobil?