Poor Linus... I can't bring myself to read all of that, but his initial plan had fatal flaws - ultimately mixing WVO and WMO was likely his demise. There is NO WAY to use a stock tank-selector valve to 'switch fuels' without contaminating the 'other' tank. He may have gotten away with his original plan of x-country in summer on unheated VO. The truth is, it prolly woulda burned just fine with 100% highway driving and minimal 'switchovers' mitigating cross-contamination. Sadly, this is one of MANY trucks that'll likely end up scrap metal due to 'alt fuels'.