Originally Posted By: Baracoa
Additional information received from Royal Purple technical support concerning any alleged disadvantage to filters with a dome-end bypass valve indicated the following:
The reality however is that there is no meaningful difference in the quality or cleanliness of oil that by-passes at the top or the bottom of the filter cartridge.
Unless the filter is positioned like in the Motorcraft graphic I posted earlier, and there was all kinds of crud/sludge laying in the dome end of the filter next to the bypass valve.
Just keep the guts of your engine clean and that will alleviate any concern about the location of the bypass valve.
Additional information received from Royal Purple technical support concerning any alleged disadvantage to filters with a dome-end bypass valve indicated the following:
The reality however is that there is no meaningful difference in the quality or cleanliness of oil that by-passes at the top or the bottom of the filter cartridge.
Unless the filter is positioned like in the Motorcraft graphic I posted earlier, and there was all kinds of crud/sludge laying in the dome end of the filter next to the bypass valve.
Just keep the guts of your engine clean and that will alleviate any concern about the location of the bypass valve.