When I got out of the service, I went to work for a VW dealership and bought an old '57' VW and restored it...ground up. It was my pride and joy and bragged to my co-workers what great gas mileage I was getting. This thing was getting over 40mpg and the engine was a stock 36 hp. and sometimes it would get almost 50 mpg. What a car! This went on for about a month and a half. Then the bottom dropped out. The mileage started dropping below 40mpg...30...20 and within a months time, it was down in the teens. Oh, to be young and naive again.
The jerks I was working with were adding gas to my tank and then siphoning it out when I was in the break room for lunch. Man, was I disappointed ... then embarrassed for being that gullible.
Bob