I've spent several hours on a couple different evening trying to relocate the site I mentioned but haven't had any luck. Searches for palm oil, SVO, mule, etc have led to lots of interesting articles but not the one I referenced.

For what it's worth I don't recall the engine being identified except to be called the "mule". I believe the engine was described as using IDI and that the palm oil was most likely used straight and untreated except for filtering, which might explain a lot about the test results.

My apologies for referencing incomplete information from an unverifiable source.

Don