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I agree. It sounds like it could be the AOS. When my aos went bad I had oil in my intake manifold it also gave me 2 CEL codes though for lean air 02 sensors both banks. While in there I also found a small intake leak so I replaced my boots and replaced a missing screw that fell from the bottom of the resonace tubes butterfly valve. All has been good since. Pulled the intake last week to replace starter and there was hardly any oil in there at all. its been 8 months or so now since the aos replacement
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"This all started with a simple oil change..."
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