swathdiver
Full Access Member
It had a crappy Delco e core on it when I bought the truck and I put the same on when I changed the oil. I heard rose e cores can be crappy sometimes and cause this issue. I hope oreilys still sells the good none e core filters still. If not I put a wix filter on it.
I think those old ones are long gone. The K&N with the nut on the end is better than even WIX, which is a great filter.