I find if it's been standing for months all the crap settles to the bottom, and the top is relatively clear. A couple of times when I've been flat broke and Marvin needed oil, I topped him up with a quart off the top off a "well settled" jug. Usually only when I was approaching an oil change anyway though. So, if you carefully pour off the top 3/4 of all the stuff that's been sitting for more than a couple of months, you might find that it doesn't need filtering. The stuff that's left is gonna be thick black crap, I'd try and find a big metal container for it, then light a fire under it, get it nice and hot and pour it through coffee filters as a first stage and see what it looks like after.
Don't think you'd get far with a biodiesel type process, probably need to steam crack it or something.
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I remember The RoadWarrior..To understand who he was, you have to go back to another time..the world was powered by the black fuel & the desert sprouted great cities..Gone now, swept away..two mighty warrior tribes went to war & touched off a blaze which engulfed them all. Without fuel, they were nothing..thundering machines sputtered & stopped..Only those mobile enough to scavenge, brutal enough to pillage would survive. The gangs took over the highways, ready to wage war for a tank of juice
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