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I have a quick question. I am going to do a compression test and then do one adding a few squirts of oil in each cylinder. In hopes of determining if my oil is coming from the north or hopefully not the south. My question is the one spark plug I pulled out had runny oil on it. Will that oil already present in that cylinder negatively impact the test? Or is that why I have to warm the car up correctly? Thanks again.
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JJG |
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