cng fuel

have any of you thought about or have put compressed natural gas (cng) conversion on trucks pickups or any other equipment. we are a county secondary road system and are looking into it, going to be expensive for the conversions and the a fast fill station. the vehicle conversion show a pay back of 2 to 3 years depending on how much annual fuel usage, the fuel station is another deal looks like around a million dollars looking into federal assistance on that.

would like to here what you guys have had for experience or rumors about it.

THANKS IN ADVANCE