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Well I can only speculate as to your oil issue. The simplest and hopeful explanation is a failing oil pressure switch. The most detrimental explanation would be that when you were having your issues earlier your rod journals weren't getting enough oil. This could cause wear (spun journal). Now it may be a little to big and allowing oil pressure to escape. I would think if it were this issue you would have a little bit of knock. I honestly feel like a lot of these OCV issues could be solved by checking the OCV filters. Unfortunately they put them in the freaking camshaft housing assembly. So essentially you have to take it down to the cams to get to them. You think they would have learned with the EJ series engines. Eventually Subaru was telling the dealers to just take the filters out on the EJ's.
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