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I am going to autozone to pick up a new fuel filter, and on there website they list a fuel filter, and also a fuel filter cap? Can anyone tell me what the heck that is? it looks like a black round piece of plastic with some sort of seal. Can anyone tell what it is used for, or even if i need it?
Make sure you are using OEM Motorcraft filters. The filters are made by Racor, you can get those, and are apparently also repackaged by Fram and apparently you can use those.
The fact that the filter you are looking at comes with it's own cap would suggest to me it's not the patented Racor filter, since it doesn't come with a cap.
I think the op has a 2001 F250. That was my concern. Don't know about the 7.3 or the 6.0 but on the 6.4, do not use anything that requires a new cap. OEM at least on the 6.4 is gonna always be my recommendation.
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