We have an 08 R&D rig just for building a WVO system for. After a 10,000 mile break in and getting a bunch of Baseline engine data with our Ford IDS, we have started test runs using a 50/50 mix of Diesel and New SVO. Only a few hundred miles, but so far Absolutely no change in any of the functions or deviations from baseline sensor data. The IDS is freakin sweet for doing this since we can monitor EVERYTHING on the truck, and even manually control many functions of the engine such as Injection Pressure, RPM, EGR, Turbo vane position, DPF, and so on. We will be acquiring a particulate monitoring system as well to be able to monitor soot production and fine tune WVO use and its relation to exhaust smoke under a variety of conditions and how to minimize smoke, or maximize efficiency if you want to look at it that way. May also do some testing on Bio as well.
SO after all of that, our initial impression with a 50/50 mix is positive. I would imagine a 50/50 blend of Bio would work well. Just keep track of how often you are getting regens. If the regen frequency goes up, you have your answer