I've found auto-shutoff to be VERY inconsistent, varying by more than a gallon regularly. That's a 10% variation in a 10 gallon tank.
The only way I've found to get a consistent fill is to manually hold the lever at the slowest possible fill rate. Only a few stations even allow such a slow fill rate - some just shut off if you try to go slowly.
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11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles
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