brokenarrow
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- Thread starter
- #31
Thanks. That’s some good information.I run the Motorcraft FL500S. It seems to be the only filter with the bypass in the top of the filter. As far as I have read, all of the other Mann-Hummel made filters (WiX, Purolator, Napa, Mobil 1, etc) have the bypass at the bottom. The bottom bypass allows the dirt on the outside of the filter media and any that's settled at the bottom of the can to circulate back into the engine. The bypass is necessary to allow oil flow at low temperatures. I change my oil every 3,000 miles so it might not make a huge difference for me but the top bypass should prevent any contaminants that the filter trapped from circulating back through the engine. I've also cut open a few of my used Motorcraft filters and I haven't noticed any loose or stray adhesive inside the filter.
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