I'm seriously considering converting my '68 truck to CNG. I was watching a piece on the local news tonight about people running CNG where the fill-up is less than TEN dollars, and the range is very similar to what a gas-engined vehicle gets. I'm NOT talikng propane, which is also a good alternative but costlier than CNG. There are several CNG filling stations in the OKC Metro area, too!
Anyone have real-world experience with CNG???