Want to conserve gasoline? What if you had to pour in gas like beer, in 12 ounce cans?

One blogger hypothesizes: "In my 1991 BMW 750iL, which gets ~17 mpg, I would only get 1.6 miles per can. That means that for my 37 mile commute to work I would have to open 23 cans of gas and pour them into the tank." Link. Via Autoblog.