Personally I would try and hold off for about another year until Chevy can come out with a new factory option. Plus 3m is working on developing a new tank to lessen the cost.
CNG may be different from LP, but back when I lived on the farm, we had our trucks and pickups converted to run on LP. The farm trucks had dedicated carbs so they ran on LP only. My FIL had his pickup set up that way as well. I insisted on having dual fuel because I knew that the LP was hard on the valves of the engines. With the dual fuel pickup, I had to make it a point to occasionally drive for 50 to 100 miles on regular gasoline or the seals in the carb would dry out from running on LP vapor.
I can't remember how many times I had to go back to the house, hook onto the trailer with the 500 gallon LP tank attached, and tow that to where my FIL was because he wasn't watching his gauge.
Even now with "flex fuel" vehicles, I learned something. My F150 is like that and the owner's manual states to be sure and drive the truck on non-ethanol fuel every so often. So, apparently the ethanol is not necessarily good for the engines either.
I drive in too many rural areas to ever consider a CNG vehicle. And for daily commutes, we only drive 3 miles one way anyway.
the tanks are suppose to be very safe. can fill up at your house. and a can drive a month on one fill up(hear say)...but the kit adds a lot of weight and electronics from what I hear. I know a guy that recently got certified to instal these set ups. but can't find his card yet. he does it on the side. but I'm assuming its kinda expensive.
I have been researching CNG a bit. There are a ton of filling stations around OKC. I drive a Tundra 5.7 about 25,000 miles a year. At $3.65 v $1.35 and 15mpg it would take me about 3 years to break even. Joe Cooper in MWC is selling F250s with a conversion that will not void the factory warranty. They haven't sourced a conversion for the F150 yet but I'll probably be in line when they do.
There are several companies in Oklahoma that are approved vehicle modifiers for GM, Ford, and Dodge. OEM Systems in Okarche is probably the largest in the state. Not sure where you got the hardened valves info, unless your talking about factory installed systems, but outside of an intake swap nothing else is done to the motor during a conversion kit install.
Right now in Oklahoma and you get a tax credit for 50% of the conversion kit until 2015. Also you can get a $1500 rebate from ONG on a conversion or new vehicle purchase and $2500 rebate for on home fueling stations
there is all kinds of missinformation out there on this subject, I have operated for two years two jeep cherokees and a honda civic GX that all run on CNG,
there are several types of conversion kits, fogger systems & injection systems, the tax credits from the OTC are good for 50% of your EPA certified kit and new tank, you have 5 years to use the tax credits, And untill they change the wording you can also get 50%tax credits on new non EPA kits with a new tank, but the OTC is talking about changing the wording to EPA kits only.ONG offers a $1500.00 rebate check for converting your vehicle with a EPA kit and new tank or $2500.00 for a dedicated conversion (CNG only) or if you buy a new CNG vehicle, the big problem is that their are just a few trucks, vans & cars that have EPA certified kits available, there are kits out there that will work on almost any vehicle, and work as good or better than EPA kits prices start about $8200.00 and go up depending on tank size and location, fogger systems can be found with used tanks for around $4800.00, fuel stations cost $5000.00 to $14,000.00 and you get what you pay for with these units the phil home unit puts out about .5 GGE per hour and wear out pretty fast, fuelmaker has one that puts out about 1 GGE per hour for about $7500.00 ONG offers a $2500.00 rebate check for a home unit there may be additional credits for home fill stations but I need to check on that, it will cost you about .77 cents per GGE if you consider electricity and maintance, ive never had any problems with the quality of CNG from any ONG station in the tulsa area, I have a website if you need more info about CNG conversions www.greencountrycng.com there is a link on the web site to CNG station locations and a link to info on tax credits
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