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I have been trying to diagnose engine knocking issues under load low rpm acceleration. So I was checking my MAF and MAP sensors and I discovered my MAP sensor was lightly coated with oil so I cleaned it with contact cleaner. So after driving for about 50miles and I rechecked again it becomes coated with oil again. Is that supposed to be normal for skyactiv?
Do I have a pcv issue or should I do compression test? No CEL codes.

2017 mazda 6 2.0 skyactiv 55k miles
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