i ran a Cummins on WVO for a few thousand miles....got harder to start and then one day it wouldnt start.I ran the 83 123 rust hole swiss cheese benz for a few hundred and after i couldnt start my cummins i decides to stop.I am planning on using the wo again but I will alter its chemicaly before.I suggest not using Svo on an engine because of what i seen when taking apart the fuel lines on the CTD.alot of gunk left behind,gumming up the fuel lines.i imagine if you heat up the entire fuel delivery system this may not happen,but i dont think anyone does.