Low
oil pressure usually means worn bearings or that something else is worn or broken and that's why low
oil pressure is something to be wary of.....10-15 psi at idle may not be detrimental...."low"
oil pressure is relative, if you have 10-15 psi at speed you have low pressure. Obviously 10-15 psi is less than many who have 30 or so at idle. However.....I would get a hold of George at Gessford and get his thoughts before I yanked the engine.......
GOOD LUCK!