Here is link I found that lists the gas stations who's pumps are not pumping a gallon but are charging for one. I wish they were also listing octaine but I do not see anything on that.

http://www.agr.state.tx.us/vgn/tda/f..._of_order.html

I own a gas station here in KY and the Dept. of Weights and Measures comes around twice a year to ensure all of our pumps(meters) are calibrated correctly. I've heard of some people doing that kind of crap, but I'd say once you get caught, that'd be the end of any customer loyalty. Plus, I'm sure it comes with a nice fine!