I use Mobil 1 oil filters now since switching from Wix/NAPA Gold. Made in USA (at least the box says so) and less than $10 around here at Walmart...…………….or $15 elsewhere.
Yes the box itself is Made in USA 🤪
I use Mobil 1 oil filters now since switching from Wix/NAPA Gold. Made in USA (at least the box says so) and less than $10 around here at Walmart...…………….or $15 elsewhere.
Yes the box itself is Made in USA 🤪
"The engine is supposed to have an oil filter bypass valve"
Yes, you are right. But what that does is let unfiltered oil through the system, probably at a reduced pressure. I am unsure how the Jeep 4.0 engine is designed in regards to the bypass. Is the dash gauge reading oil pressure right off the filter? Or line pressure after the bypass? If it is filter pressure then that would explain why the lifters did not tap at 0 psi, they were getting bypass oil. That is why I prefer to tap into an oil line somewhere besides the filter mounting boss. On our V-8's we can use the tapped hole up behind the distributor which is right off the lifter gallery. The Jeep has no other tapping as far as I can tell.
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