Originally Posted by JB3

This is exactly why the idea of a single tank VO system is ill conceived at best. They only work in southern CA and florida, and only for a certain amount of time, because as you point out, the engine gets worn out from trying to pump a thick fuel, cold thick fuel going through injections gums them up, coaks up the rings, ect. The worst thing that ever happened to the VO industry, was how so many reliable diesel models of car and truck will run VO for a while with nearly no mods, despite a crappy single tank arrangement and a line of BS from a company or companies producing single tank kits.

To run it forever, you need a two tank system, start up and shut down on diesel, use the diesel fuel to warm up the VO, switch when things are hot, switch back before shutting off. I don't adhere to the magic temp of 160 degrees. All oils are different, the correct temp is hot enough to flow like diesel, the incorrect temp is cold enough to not flow like diesel. If different for every oil and how every system is designed