Walter:
I don't have anywhere near the technical skills necessary to debate this from a scientific viewpoint. Rather, my reservations (which, by the way, are limited, because there are circumstances under which I endorse LOP) are mostly operational. These have been presented at length in this forum and are summarized in the third message of this thread:
http://www.337skymaster.org/messages...&threadid=1208
On the fourth message of that thread I refer you to a Lycoming document which goes into more detail on the operational concerns.
Ernie