Comment Re:They should upgrade the warning ... (Score 4, Informative) 526
If road/car safety was left to the "invisible hand" then people would still be driving around with "DIY LPG conversions"
If you had any idea how many DIY LPG conversions there are running around on the roads right now, you would apparently piss yourself. And besides conversions, it is hilariously common for people to do DIY propane systems on their diesels. Apparently it provides a power boost similar to a turbo, and propane is cheap these days so it's cheaper than using a turbo to burn more diesel. A grill tank goes in the bed or sometimes in a toolbox and gets connected with some more grill parts, like a grill regulator and nozzle. These systems are relatively trouble-free so long as they're installed such that the line isn't run someplace idiotic.
As well, you can get a propane conversion for pretty much anything carbureted for about $250, not counting the fancy tanks you have to have for road use.
I've run a 2.5 HP briggs and stratton four stroke by connecting a nipple to a camp stove (throwaway) cylinder and running a piece of 1/4 inch tubing into the carburetor. The nipple is based on a torch head that fell off, so there's a valve there. You can control motor speed by turning the valve, simple as that. The conversions use a vacuum-controlled valve, so the engine draws the fuel it needs and you control the butterfly in order to control the engine as normal. Anyone competent to turn a wrench can perform a conversion and again, there's currently significant cost savings in running propane. It's 2.50 per gallon-equivalent on one of the local reservations right now.