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was told that Ford uses factory installed Wix built filters, so that if the engine has an oil related failure they can see if the engine has ever been serviced.
It's possible I suppose, but I'd think it's more about who gets the Factory Filter contract. No matter who it is, FoMoCo label on the can and that would distinguish it from the MC off the shelf filter. Prior to Wix it was Champ Labs, same white color can with FoMoCo one it.
And topic filter is a Wix made filter, not Puro US and not Mann made filter. If the latter logic followed then current Fram would/could be a Trico filter. If one wanted to say M&H got the contract for Wix production, that could make sense. Puro US currently makes MC oil filters, not Wix and not Mann.