I have used Motorcraft Filter since… forever and have never had a problem.
If the filter was the correct one for your engine then the only thing is the Gasket but you said you checked or maybe not tight enough.
Don’t give up on the MC Filters, they are rated above average, Mobile 1, although rated well enough, i snot my fav…
Mobile 1 every 6K with Motorcraft Filters at 3K, with added oil and 6K, then repeat…
I didn’t know Wal Mart had MC Filters will have to check it out the next chg.
Mobile 1 = $28 for 2 chgs, 6 months (CAPS Auto Parts Store Special - $28/6 qt.
MC Filters = 2 x $5 = $10
Total $38 every 6 months… or $19 an Oil Chg; not too bad !
4x4, 5sp, Std Cab, Stepside, E4 Red
4” Lift - Coil-Overs, 6” SkyJacker Leafs - No Blocks (Mistake)
31 Spline FX4 Rear Axle, 4.56s and OX Locker, Hurst Shifter w/Optional Stick and "Made by Grev" alignment adapter