Here in NJ, we pay less with cash. So the attendants more often than not, top it off with some excess gas to round it off to the next nearest dollar amount. This morning, the pump shut off at about 12 gallons+. But the attendant added some more to round the amount to 23.50 resulting in 13.996 gallons. This really screws up my mpg calculation.
How do we work with Fuelly in cases like this? This always happens in NJ.
piscataway 
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