I've been running WVO in my 300D since last Sept. and I've put in over 4K miles on it. I decided to do a compression check using a Snap-On pressure gauge today. The readings were near perfect, from 410 to 420 not more than 10 psi variance between the cylinders.
What probably didn't surprise me were the deposits on the injectors and heat shields. The deposits weren't your usually black powdery soot but this hard glossy looking crap.
It looked a lot like the deposits in this photo.
Except the deposits were a bit more dramatic in appearance that looked like the spray pattern frozen in this hard black crap. It was really hard to clean off the injectors. I could only imagine what the pre-chambers and cylinder head looks like.
I was using WVO dewatered and filtered down to 1 micron. In my car I have a two tank system. I heated the WVO tank plus used an electric in-line heating element. I always started on diesel and shut down on diesel so as to make sure that I did not start on cold oil.
I'm seriously beginning to have second thoughts about running WVO any more.