I'm in my 3rd year of running WVO trouble free in my 82 240 using your single tank system with boost pump except for a couple of self inflected problems ( dewatering). I up my mix of diesel in the colder months and run 100% diesel in December, January and February turning off the glow plug heater. Last year I left the system in the loop mode with no side effect thinking the loop will aid in minimizing gelling. I'm in to the same cycle this year . Any downside to looping straight diesel in cold weather?
thanks,
Fred