how did you check the rod bearings? what about the main ones? it's not necessarily how they look but the clearance is mainly the issue, since they are new and you only put 10 miles on the motor I would expect they look just fine regardless.
EDIT: have you tried a new oil filter? i had an issue once with a new one that had a stuck or bad valve and was barely letting oil passing thru, if you replaced it already then disregard - long shot but you never know.
here you go, hope this helps.