They've been running this way in Europe for a good while(England, Germany and such). the quick jist of this is, to run on the fry oil, the kits, one could buy have larger injectors or Nozzles dependant on the engine. the engine is ran on diesel for the first say 10 miles because the engine has to warm up, which also has a heater core or a element in the oil that heats it up. the added Piece of these kits is a regulating valve that switches over manualy with a switch or automaticly when the engine and oil are brought to the proper temp, right around what the engine will run at 175-195. hot oil atomizes better than cold right! when your done running, switch to manual, runn the engine for a few minutes to clean, purge or thin the cooking oil. then your good to go, a couple of things need to be brought up. 1 what happens to oil that constantly has water intoduce, say like a deep frier?? Any one? Right AlaskaRedneck,, you get a acid, our engine oil we run has a addative inside it to counter this acid, think of those who are north, run to the store, or just a quick engine start, condensation can and does get inside your engine, just look at your exhaust, it steams when you first start right, but it goes away once the engine gets warm.
this acid that can be in these cooking oils that are from the Restauants can very on what oil, what temp or what was cooked. My job with the coast guard as a Machinery Tech or Mechanic has taken me all over the world, i've seen engins that run on bio diesel with no mod, i've seen engins with conversions for cooking oil, hell the goverment is testing and has been running equipment for a good number of years that can run on any Non synthetic oil, including cooking oil. The HMMV or Humvee, hummer H1 is designed to do this. quick and simple, get some test strips from a source that tests for acids, alkalys. Grainger, McMaster Carr or even a Auto store might have a inexpensive test kit for this. The acid though mild or slight will corrode the fuel pump plungers of the H/p fuel pumps or injectors, it'll corode othe parts also but these are the most prevalent. this is what i've seen, the Farmers i'm going t otalk about just added there used motor oil to the drums and repumped the batch and would retest. i'll keep it short, sorry. 2 Farmers in Arkansas one ran cooking oil, one ran cooking oil and deisel 50/50. Both ran there oil through there filter system. 4- 55 gallon drums with hand pumps that had spin on filters on them. fill drum one with colections for Burger king, McDonals and such, took home, put in drum pump, hand cranked over through canister type filter into second Drum that has another hand pump with a spin on style filter, pump to third drum, third drum same thing hand pump, filter into fourth drum for storage or into second tank in back of truck. this is the tank that has the heater to assist the oil to flow better. I've watch both farmers do this proccess, since they were brothers they both had farms close together. The one that ran the cooking oil, had the mod, the one who ran 50/50, had the option of 2 tanks(ford), the forward One was 50/50 the aft one was regular #2. last thing also, and this is a good one i've been thinking of. I know of a few trucking companies that are large, that reclaim there oil, put it through a filter and pruifier, and then put the oil into there bulk fuel tanks that top off there trucks on site. All the purifier does is heat the oil, inject it into a centerfuge that spins it at say 15000-20000 rpm and the contaminates(particles) are removed. we used them on our boat, those with purifiers, never change there oil, just suplement or add oil as needed, just run the purifiers on the engine after 250 hours is the norm, some even have spinner type filter systems that do the same as the engine is running, cool stuff. Ever wonder where the used oil goes? The shops sell it to refineries, wow. all the oil we give to them they sell, or they may use in there oil burner heaters, Damn time to store some oil. Sorry it took long but were underway on Patrol and i have some time to type befor going on watch.