Totally Dissapointed!!!!!
thats what I thought about the dyno...
I always changed to a heavier weight oil as I got more miles for that situation. more clearence on everything would need more weight to bring up oil pressure and ease knocking. for a new motor with 400 miles on it that sounds weird, but I have not built many motors so you probably have alot more knowledge on the subject then I do...
did he ever look to see what color the smoke was? I was always told if you are rich the smoke will be black, if you are burning oil it will be blue or white in color.
also you can pull the plugs your self and probably figure it out. if the plugs are black then you are rich, if the plugs are white you are lean. also look for oil on them and see if they are soaked with gas...
write it all down marking where they came from and the condition each plug was in. that will at least get you to where you know what cycl, is suspect.