Rubber plug in filter can?

Joined
May 21, 2012
Messages
6,765
Location
Fort Lauderdale, FL
I was under a car a few days ago and saw it had a rubber plug in the can, and a similar rubber plug in the oil pan. Looked almost like it had a small hole in the center of the plug. Anyone else seen anything like this? I should have gotten a picture.
 
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