How much does it cost to convert a vehicle to natural gas? Also how many fueling stations are there around Colorado? (I’m in Arvada, and have a fairly thirsty Caddy).
You are going to want this url http://www.altfuelprices.com/stations/CNG/Colorado/Denver/
You will note that the PUBLIC filling stations charge for overhead, taxes and profit so the GGE price right now is between $2.00 and $2.25. If you use a home filling station, you can get the lower rate.
HOWEVER, you have to buy the home filling station and have it installed. Also, you have to covert the vehicle. If you are going to try and get the $4,000 tax credit, you will have to have the system meet certain standards. On average about $2,000 to $5,000 depending on the make, model, level of certification and the cost of the home fueling station.
Generally speaking, the tax credit makes it a wash from an initial capital expense. Your milage may very so do your home work.