I do record the data on a mileage log. It's not with me now to review. However, I also reset the mileage estimator each fillup and it's usually pretty close, at least within an mpg typically.
Thanks for the input, I'll have to do the real math from my numbers to find out. I suspect I still had a higher blend of real petrol in there that took 2 more tanks to go through as I filled it up twice when there was only half a tank or so in it because I was heading over the mountain pass with fairly long distances between the next station.
On the way home I topped it off, about 5-6 gallons of typical ethanol blend, then trucked all the way home, 331 miles IIRC, until the thing was on fumes. I pulled into the station and it took 11.46 gallons to fill the tank once I was 2-3 miles from home. That's the furthest I've stretched it on the yellow light, doubt I'll stretch that far again. Car may be considered light at 2750lbs, but that's still a lot to push.
