Jeremy, I know multiple people running filtered WVO in their 12 valves so your safe, and you mix the methanol and lye creating methoxide, you mix methoxide with WVO and drain glycerin by-product, then wash, then dry, then I'm filtering it through a 1 micron whole house water filter and a 5 micron fuel/water separator b4 it goes in my tank. As for clogging my fuel filter biodiesel is a solvent, its actually cleaning the crud off the bottom of your tank, its not the biodiesel itself, I am going to mix it 50/50 then 75/50 just to make sure I'm ok.