Rotella: The world's first ever combined hair oil, foot ointment, and salad dressing
CF Veteran




Joined: May 2012
Posts: 7,965
Likes: 964
From: Lost in the wilds of Virginia
Year: 1998 Classic (I'll get it running soon....) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
Could I have achieved the same results just by using "new" oil of the correct type? Without a doubt NO, due to the physical damage that occurred the factory-specified oil is no longer relevant to my application. There also isn't, as far as I'm aware, any product on the market that meets my requirements, as this is such a rare circumstance. It's not as good as new but it's sure cheaper than a rebuild!
Hmmm. Mebbe, mebbe notley. My AW4 was toast by anybody's standards. After an hour's drive, it started slipping badly, to the point where I could barely get it to move. It was okay when cool, but warm was a no-go. The fluid was black as what you describe.
A complete fluid replacement with NAPA branded Dex/Merc and it's been good as new for the last 15,000 miles, which includes daily drives of over an hour, much of that at 55-70, and most of the remainder in stop-n-go traffic. It has included many towing trips, too, with a ton or so behind me, some of which has been in 4WD moving slowly.
CF Veteran




Joined: May 2012
Posts: 7,965
Likes: 964
From: Lost in the wilds of Virginia
Year: 1998 Classic (I'll get it running soon....) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
Seasoned Member
Joined: Dec 2009
Posts: 460
Likes: 1
From: Colorado Springs, CO
Year: 2001
Model: Cherokee
Engine: 4.0L
No, I don't lick fish.



Joined: Mar 2011
Posts: 11,169
Likes: 26
From: Northern Kentucky
Year: 1999
Model: Cherokee (XJ)
Engine: 4.0
Thanks for posting, Salad - everyone on here preaches Rotella, but I've never seen any proof about why until now.
RT6 will be in my next oil change
RT6 will be in my next oil change



