Once upon a time, before computers entered the automotive scene:
There were conversion kits to convert your gasoline burning automobile to LP - liquid propane gas. Natural gas is actually a mixture of gaseous hydrocarbons and carbon dioxide. To transport natural gas, it would have to be in a liquid state and if you go that far you might as well separate the components and just use LP.
The basic LP system consist of a tank, regulator/ gasifier, and a valve/ metering system at the engine intake. It is a fairly simple system still in use on some industrial lift trucks.
The major issue is the automobiles computer and all the garbage hooked to it. In the last 10(?) years, the computer also governs the transmittions shift points, without the proper inputs the computer will not shift the trans out of low gear.
Back in the 70's, along the Mexican border, Texas ranchers converted their pickups to run on LP. You would see these 200(?) gal tanks mounted behind the cab (in the box), they would fill them in Mexico, at a real good price.
>>It would take a lot of tinkering to make my diesel run off LNG.
AllenF; check out the "Farm Show" magazines, (I think they have a website also) content: Farmer inventors. I seem to remember some articles where diesel trucks utilized LP to increase "power and economy". I think I remember one that actually ran his gasoline pickup on carbon monoxide, produced by the incomplete combustion of fire wood.
** yup, there is a website**
Check your owners manual, I seem to remember in the old 5.7 liter Chevrolet diesels, you could use UP TO 10% gasoline as an anti gelling agent. Of course if I am wrong, :oops:your crankshaft will probably exit the vehicle.