I just found about a 500 galloon supply of the stuff and about 20-40 gallons a week!!
 Now to buy me a diesel ANYTHING!

Don't dump diesel in your gas tank for a gas engine IT WILL NOT WORK! It may ruin your engine also! Back around the late 70's I knew someone that used diesel by accident in a Cadilac with a nice big monster engine, high compresion too, it did not run on the diesel and he never got the car running right on gas again after that either. Now as far as veggie oil I expect it to be the same thing in that respect.

First, gas ignites by spark but oil does not. It takes the heat caused by high compresion to ignite the diesel. When you compress it in the cylinder heat builds up and it explodes. A gas engine normally just does not have that kind of compresion ratio's.

Now here is what I will be experementing with!
Gasolene vapors to ignite from the sparkplug as normal, waste oil to burn and create the power, water to cool the engine pistons.

Gas vapors will run an engine, just about everyone knows more gas is ran though the engine than is needed to run it, the extra unburned gas is used to cool the cylinders and also the reason we need catalytic converters to burn the unused raw gas in the exhaust pipe. Run an engine too lean (low gas high air mix) and it runs fine, untill the pistons melt and blow out! Or other damge could occure, burnt valves ect..

Gases are funny things, we cook with propane just fine, mix plain air with it using a blower and you can melt aluminum for casting parts! Gotta watch what you do inside an engine!

So, using feul injectors and some switches/sensors I am going to build a 2 and 3 feuled engine building my own carburator for it. Basically remove the existing Holley 4 barrel and build a new one with injectors. I will also need 3 feul pumps! 1 for gas, 1 for water, 1 for oil. That's the plan for my F250 truck.

My first try will probably be just gas/water on a junk Toyota van I have, runs great except the feul pump does not work in the tank and I don't like the van anyway. This will be a genterator ran often and see if I blow the engine, I have a second van exactly the same if I blow the enigne in the first, to try again :)
 Those are feul injected already, so I will remove those injectors.

For a carburator engine I will use a Ford 302 or 351. I have a 1/2 van with 302, F250 truck with 351. If I blow the engine in the truck I will install the 302 in it.
 I never liked 351 anyway and would rather have the 302 in the truck.

I would not try this on your daily driver that you depend on!! I have lots of spares, well over 30 here!!

And I am kinda building the carb from scratch, my own design for the mixing of the feuls.
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nothing to lose

Even in a diesel, it needs to be filtered down to less than ten microns and preheated to lower the viscoscity so it won't hurt your injection punp or fuel injectors sooner or later.  There are fuel systems that are very tolerant of unheated veggie oil, but they are rare.

Best regards,

Why?... Tax! The gov. makes a shed load of money on each gallon we buy (now nearly £4 per gallon - that's about $7 per gallon).

If you use old veg oil you don't pay fuel tax to them and they don't like it!

RANTING POINTS:
Veg oil is probably lower in sulphur content than fossil fuel.
Veg oil is 'carbon neutral' ie the CO2 from the air is absorbed by the plants and turned into oil. We burn the veg oil and return the CO2 to the atmosphere but no net increase. Fossil fuels increase the glogal CO2 levels.

OK rant over but all our local chip shops have to pay to dump their old oil and I run a diesel car and I can't reuse their old oil.