Validated!
Drove 28 miles between fillups. There was a bit of gas still in the pump at the second gas station, so you might say this wasn't a clean test, but even with a second click, the most I could get in the tank was .345 gallons. I'll be a little more impressed if I keep this up through a whole tank. Also, I tried cutting the engine while coasting the rest of the way home ~15mi, and it didn't seem to have a noticeable impact on the average mpg, so I think I'm going to keep leaving my engine running from now on.
I think cutting the engine would make an alternator delete a bit more problematic as well. After I put in a deep cycle battery, I'm starting out with an alternator disable switch before i take it out completely.
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