I wonder what the battery level was before and after the 250 mpg run.
If the battery level is lower at the end than the beginning, then it gives a false impression of better MPG.
The XL1 is a PHEV..
250 MPG seems high; I would surmise closer to 125-175 mpg real world driving, and 200+ mpg only if used as a PHEV and the electricity cost is ignored. Or if you're a hypermiler.
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2013 Toyota Prius C 2 (my car)
2015 Mazda 3 iTouring Hatchback w/ Tech Package (wife's car)
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