Troutman, I used that Penrite at my 50K service, genuine filter and I've done 10k since. I rang and spoke to a Penrite Tec re the CJ4 issue and he said it was ok and the 5w-40+ was the best choice so I ran with it.
I'm due to head up North in about 7 weeks and will do my 60K before I go.
Like you I found Mobil 54-40 prices amounted to extortion.
Hope this helps
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“RED = Retired & Extremely Disinterested (Locksmith)”
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