Anti-drainback valves in oil filters

Mark20

Original poster
Member
Dec 6, 2011
1,630
At least for GM's typically vertical mounting of the oil filter with the threads at the top, is an anti-drainback valve really needed?
 

Wooluf1952

Member
Nov 20, 2011
2,663
Milwaukee, Wisconsin
I would think any time the filter is higher than the oil pan, you would need the anti-drain back valve.
 

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