Guys, there is plenty of info here.
If you're on the fence but have a lot of clean, used oil around make sure you have a way to.filter the oil down to 2microns. Maybe filter it in stages. I recommend heating it somehow to help release suspended moisture. Then again, your #2 might have frikkin water in it and it goes straight into your tank. Anyway, filter it well. I did use the stock fuel bowl/filter when I was running this stuff but Id strongly urge you to run a pre/post pump filter setup just for the filtration increase.
If you have a good amount of oil and have some cash and want to really try this buy a centrifuge and the oil is as clean as can be. Then its just a matter of making sure you're truck is.mechanically up to the task.
Id filter it really well, try 5gals in a tank and see what happens. If you dont notice anything, you could.stop there or continue usage at 5 gal per tank to defray your fuel.cost and get rid of your expensive oil that recyclung places sell for $. Orrrrr, you could bump the amount up to 10 gal. Now you're at 1/3 concentration. The exhaust is going to start smelling like a gasser with worn rings. At idle you shouldnt have haze unless you do anyway. Bump this up to 15 gal. You are nearing 50% wmo. Expect idle.haze because the oil isnt burning up under 500°. You'll notice the truck runs really well. Fairly quiet.
Ive gone higher and only noticed worse haze at idle. Smells like burning oil, no.doubts. I was near 70% during the summer of 2010. I ran this way for two months. No issues other than the smell and haze at idle. Put stage 175/80s in and upon startup it smoked slightly worse than it did with stock injectors. The haze continues during driving until egts reach 600+(im guessing more fuel during injection). I dialed my usage back immediately after that first tank. Ran the level waaaay down and changed the fuel.filter. Filled with #2. When I reached the 3/4 tank mark I topped off with oil. Noticed nothing. Edit: I think some of my issues, although miniscule, could have been improved with an aftermarket high performance oil pump)
I kinda threw a little in here and there after the injector swap. Got busy and didnt really have time to keep my filter and burn operation going. I swapped to 100% nozzles and never used anymore wmo.
That was the conclusion of my usage. I have ten gallon jugs of filtered wmo in my garage that I just never ran. Id do it again but this time Id go.and get others used oil(buddy farms and said he produces about 100 gallons a month of used oil) and run it through a centrifuge. Filter it during filling my tank with it. The cats azz would be to have diesel and scrubbed oil in tanks.and have them."mix" as you fill up. You'd be at 50% concentration.