As soon as I get my car up to speed...ie, vacuum system air tight, valves adjusted and leak on gasket cleared up, glow plug holes reamed and plugs replaced, I plan on converting to run on WVO too. I've done a lot of research over the past several years, and nowhere does it seem possible to have a single tank system in cold weather unless you start cutting your wvo/svo with either kerosene, rug, or diesel...kind of defeats the purpose of going WVO in my mind..ie, .being greener, not relying on big oil for fuel, and finally, being cheap and saving $.

Just my opinion...