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[blitzlaw]

I just want to second your point on this. I've been running WVO using a Greasel Nomad system for the last 2300 miles. During this time, I've seen lots of negative information about the environmental effects of burning WVO, including the Acrolein issue. The only substantiated environmental downside is higher NOx production.

On the one hand, I readily admit to knowing very little about chemistry or engineering. On the other hand I do have a strong grasp of the concept that science is based on informed analysis, grounded in the known.

From my own experience, and my belief in what others have claimed as their experience, I can confidently state that WVO is an effective replacement for petroleum diesel in many situations, if it is properly prepared and heated. Why some folks have a real problem with this is beyond me. To the extent they have experience or evidence to support their criticism, they are contributing to our future improvement of this technology. To the extent they offer unsubstantiated rumors, they are at best a distraction and at worst a deterrent to otherwise well-meaning early adopters.

I also note that OMCUSNR_RET has regularly participated in biodieselnow forums, and has a strong bent (for whatever reason) against WVO. When asked for some evidence, it's my guess that he will point only to some press release from biodiesel.org.

Acrolein production has never, to my knowledge, been documented in diesel engine exhaust. Instead, it is a theoretical byproduct of the combustion of glycerine. I don't doubt that a small amount of carcinogenic material is released in my exhaust. But one can't seriously suggest that petro-diesel exhaust presents a lower health risk that WVO. Where Bio-D fits into that hierarchy remains to be seen, but it's not competitively priced for the time being.

Now what we really need are studies of heated WVO combustion systems with Petro-D and Bio-D engines as controls. Who would sponsor such a study? Who would it benefit?

Perhaps OMCUSNR_RET has some thoughts.