I have the exact same problem and thoughts on this problem, seems to be a volume of oil issue since its intermittent, and leaking from starters that have been recently replaced, I think its up to us to find a solution and post it, to put this evasive annoying problem to bed, any further recommendations ,from anyone with experience with this problem,I am going after the scavenger
 tube area myself
    
    
    
 
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