That's just crazy! I suppose this was an actually issue (defective engineering possibly?) Holes, Louvers... Neither of those matters when there's no clearance.On my old NISSAN filters made in China, there was no room for oil to flow around the cardboard endcaps inside, Maybe 7 to 10 thousandths in some spots but contacting the can along much or the perimeter.!
So inlet holes were the least of the problem. And, Yes, it ruined a new engine.
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