The guy I spoke with is actually working with Aubrey on the Chesapeake owned vehicles for CNG conversions. Devon is in the discussions as well.
Boone is part of the difference in price for gas in OK versus TX from what I was told. I guess he controls a good portion in TX and prices it at a delta to gasoline as in 30-40% less than gas.
My Dad ran his work truck on propane back in the 60's, yes it has been around for awhile.
Part of the current expense/issues surround potential inspection of the conversion, there are cheaper routes but as this industry grows you may have a conversion that won't pass inspections, so you want to have all of the certifications in place to be legit.
For me it looks like the break even point on a 50/50 conversion is around 40k-50k miles. As my current ride has about 70k on it I don't see myself keeping it long enough to make money on the deal, I will wait and convert the next new one I buy.
If the conversion costs are between $12-$15K wouldn't it be more prudent to purchase a factory installed CNG setup new or used?
Here's a few used vehicles with decent mileage and a variey of fuel sources. Most of these are around $10K
http://www.cngvehicles.net/
They are located in Morris, OK.
I would prefer a new factory installed CNG setup over an aftermarket install. Unless the CNG was not available...