Making Translucent WMO Blend Diesel Fuel
I read this a long time ago but if I remember correctly, this guy had trouble with precipitate/gelling and coking of injectors in very short time when mixing WMO with WVO.
However, if you are just purging with WMO, mixing would be minimal and there would be no precipitate in the tank since they're not mixed. I'd say you'd be fine but I don't have any first hand experience.