There is a much better and cheaper way that does not require the purchase of new vehicles.
Your links are rather lacking in the cost support of that claim.
Several companies have done Gas-to-Liquids (more typically diesel like rather than gasoline). They include majors like Shell.
Construction of the world's largest gas to liquids (GTL) plant, Pearl GTL in Qatar, is a major step towards meeting the worlds growing demand for cleaner energy.
http://www.shell.com.qa/home/content/qat/products_services/pearl/
I've followed such projects for years. It would make a world of difference to a place like the Alaskan North Slope. The technology is well developed. The economics don't work in the US, yet. Eventually I suspect they will.