If your truck has run diesel since 1995, your problem is more than likely all the diesel build up in the tank over the years.
Because bio mixed with gas is a solvent, you have cleaned you fuel system now and it is plugging your filters and injectors.
The best way to correct this is to drain the tank and start over blending small amounts of wvo with large amounts of diesel until your diesel build up is cleaned out.
You may end up changing your filters allot at first, but I can tell you that wvo and bio fuels work.
I ran the stuff at 100% for 30,000 miles with no trouble at all.
The only difference was I had a new truck that did not get the diesel build up in the fuel system.
Mixing gas is not really a gas idea , you should process your wvo, wash and filter it to remove soaps to avoid fuel system problems.
Hope this helps .