Wonderful idea but the execution could have been better IMHO. Entire shot seems out of focus and I do not really like the angle of the truck. I would try different angles and playing with the contrast / brightness / hue's in post processing to make a more dramatic effect on a wonderful idea.
It would have given a more "conspiratial" element had you made the prices of the gas in focus. I just noticed the guy standing guard as the gas is being pumped in. Too bad he isn't standing there by the cones in the same stance.
I would have liked to see something else in this shot to really make it apparent what you were talking about. Either the prices on the pumps, or on the main sign. The night-time colors are also a little bit weird, you might see if you like it any better in B&W.