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Ken Haase · 03-05-2009, 01:23 PM

Generally speaking, an anti-drainback filter would only be necessary when the filter is mounted horizontally or where the oil could exit the filter when the engine isn't running. Applications like Chevy's and other vertical mounts shouldn't require the valve in the filter.

03-05-2009, 01:23 PM	#2
Ken Haase Member Join Date: Mar 2007 Posts: 233 Likes: 0 Liked 1 Time in 1 Post	Re: Oil Filters Generally speaking, an anti-drainback filter would only be necessary when the filter is mounted horizontally or where the oil could exit the filter when the engine isn't running. Applications like Chevy's and other vertical mounts shouldn't require the valve in the filter.