Andy3, I have been running a 1983 Chevy G-van with a 6.2L diesel engine in it on gasoline blended with WVO almost exclusively for 8 years, which was only about 10,000 miles, because I live in a small town, and tend to walk or ride a bike, so I do not drive much. For the most part I have had very little trouble with this blend. I have even started my engine on this blend at 0F (-18c).
However, I have had no end of trouble trying to get WMO to run on it without coking my injectors badly. Originally, just blending WMO with gasoline at 20% gasoline, then setting it for even a month or 2 still coked my injectors in days/100s of miles. I found using the chemistry principle of the partition solvent I could remove most of the carbon. At that point I got 3 about months on my translucent WMO blends, but my injectors still coked, but the coke was yellow, so I reason it is most probably sulfur.
How to get the carbon, ash and sulfur out of WMO? Distillation so far seems to be the best solution. I have been working on that for about 3 years. It works, but it is energy intensive, toxic, expensive, and dangerous.