In 2000 the state of AZ had a rebate program to push the "green vehicles" it was a crazy rebate. I bought 2, 26-K ford f150 trucks and basicly got one for free. The only catch was you had to have enough cash or credit to pay for them up front and then the state refunded you like 40% of the purchase price of the entire vehicle. Even though the cost of the conversion was only about 5-k, funny thing was I looked into it a year or to earlier and it was only about 3,300 bucks, what a scam that was. I was interviewed at a fueling station and whenever they ran a CNG story for the next 2 years it was me on the stock footage in the background. I'm lucky I wasn't shot, once the public found out about it they were rightly outraged. Thank you Janet Napalatano I was one of the first to take delivery. I also got $15 registration for the life of the vehicle that was a 600 savings the first year too. The special license plates allowed me to drive in the HOV lane alone... man those were the good ole days.
I still have one of the trucks 228-K miles with no engine problems. The tranny is shot now and its sitting on the side of my house. It was under-powered on CNG by about 10% hardly noticeable. the fuel mileage was also about the same. I didn't get the compressor on the house another 5-k but again the state reimbursed you for it I just didn't have the $$$. My neighbor did but he didn't like it. It took quite a while to fill the tank and it made a lot of noise.
It was difficult to find service techs to work on the vehicles and they changed the CNG platform on us in 02 or 03 and parts were difficult to get. Also my CNG tank has a "lifespan" of about 10-11 years it is stamped right on the side. I didn't find that out until I pulled off the decorative cover to clean out the bed. Its out of date now. I would buy another CNG truck in a heartbeat.
I have heard you can blend/add CNG to diesel and get improved power and MPG but I'm just too busy to monkey around with that kind of stuff.
“If I accept you as you are, I will make you worse; however, if I treat you as though you are what you are capable of becoming, I help you become that.”