Hah! That's great - the ethanol replacing MBTE in gasoline has been scouring out the meters in the pumps, biasing the measures downwards so that consumers have been getting a hair more gas then they pay for, on average. That's a benefit of ethanol I hadn't considered! Although it'll probably bite us in the end as we pay for the increased cost of the gas inspectors' time & the early replacement of the eroded, damaged meters. Among other parts, no doubt.
h/t Gas Buddy, which is a daily, sick fascination. And a good source for energy stories.