Well, for what it is worth, I have been burning WVO for the last seven years. At first, I had problems with soot and clogged filters. Now, I have my setup for pre-filtering with 25 micron sock filters, final filtering with a centrifugal filter down to <1 micron particle size, and I preheat my WVO on the vehicle just before the injector pump to 145 degrees F. There is absolutely no soot (be glad to send pictures of the clean bumpers and back end on my M-B), my filters last until I normally change at 12,000 mile intervals, and I Love to watch the people in my rear-view mirror as they lift their noses, sniff, and wonder who is barbequeing somewhere.
I also heat my house with the same fuel, using a slightly modified oil furnace with a Beckett high pressure atomizing burner. It burns clean with no smoke out the chimney and keeps an old two story, 3,000 sq. ft. house toasty warm during the Winter. I am not set up to gather and process fuel on the road, because you never know what kind or quality of oil you may get, but I never really meant to go that route, so not a problem.
Last but not least, Tennessee has a couple of initiatives for alternative fuels that most states don't. The East TN Clean Fuels Coalition (ETCFC) based out of UT at Knoxville has all of the information necessary to apply as a licensed "fuel blender" allowing a tax CREDIT of $1.00 for each gallon of fuel you blend. As for the FedGov, ignore them until they come looking for you, then they still have to prove their case. Personally, I am proud to be helping the environment, reducing my carbon footprint, and refusing to support shiite-head terrorists.