Dave, by your comments this is SVO? so no need to do anything with it can be used as a biofuel the way it is, i know individuals that run two tanks, one diesel for start up and they then switch over their WVO, ie..... used fryer oil, all they do is run their oil thru a
coffee filter to get the trash out of the oil, when they get close to their destination they switch back to diesel for easy start up, the used oil will congeal as temp's cool if it is not processed so they run a copper line around the exhaust to warm up the WVO to help keep it liquid under these circumstances and they have been doing this for several years. no engine issues except for the normal rubber parts issues when using biofuels, i have heard some are mixing their own 80/20 blend, 80% diesel/20% bio during the summer months
you could also use it as a heating oil
regards Stark