I built the Bio reactor a couple years ago. I made one batch with it. It was more fun making the contraption then making the fuel. All I have is an old '94 chevy with the 6.5l turbo. I didn't want experiment with it because the pump is expensive and the injectors are real hard to get to.
I did burn it in bug torches and started brush fires with it, seemed to burn OK. I needed to wash it a final time to burn it in a vehical tho.

I am looking for a very cheap POS diesel car or truck to run on bio, if I find one then I will start making it again. Diesel here is $4.30 a gallon.