I've seen this a few years back. Pretty silly stuff.
What about the energy used to extract the fuel from the ground in the first place? Oil sands? What about refining it? Transporting it? Environment impact of pipelines, development, roads, etc. in addition to the manufacturing cost of the vehicles in the first place?
We should just all grow our own vegetables in the backyard of our mini-house or balcony of our mini-condo, and find a job that's within walking distance of said condo/house.