I say ford with over 100,000 on it. Mine did that around the 100,000 mark. Last week it rolled over again to 200,000. put a new pvc in, new air filter, and clean it out. :santa
There's also supposed to be a little breather element on the inside of the airbox held in with a little clip to scrub some of the oil out of the air that comes in through the PCV valve.
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