Diesel Oil
Senior Member
Joined: Mar 2012
Posts: 974
Likes: 14
From: Racine, WI
Year: 1997
Model: Cherokee
Engine: 4.0
Ugh, this thread may as well be closed now. I'm seriously considering never helping anyone with oil ever again--the bad info is endless and people really seem to love their misinformation.
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Member
Joined: Mar 2014
Posts: 228
Likes: 1
From: Lawrence, MI
Year: 2000
Model: Cherokee
Engine: 4.0 HO
It is similar to trying to educate on batteries. I mean you know cement sucks the life right out of a battery. Of course that was when battery casings were wood or natural rubber. And when was the last time you saw that..
Senior Member
Joined: Mar 2012
Posts: 974
Likes: 14
From: Racine, WI
Year: 1997
Model: Cherokee
Engine: 4.0
CF Veteran


Joined: Jun 2011
Posts: 2,720
Likes: 44
From: Gainesville GA
Year: 1999
Model: Cherokee (XJ)
Engine: 4.0
Member
Joined: Mar 2014
Posts: 228
Likes: 1
From: Lawrence, MI
Year: 2000
Model: Cherokee
Engine: 4.0 HO
Yeah I am not that old.. But as an instructor I had better know the reason for the old wives tale. And in fact I have a wood battery casing at the school that I show students when we are learning about batteries.
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



x2 - Every cheap oil is fine... but Pennzoil isn't? You've effectively trashed the first part of your "point" with the second part of your "point" within the same sentence. Kudos. I didn't even know that was possible.
CF Veteran
Joined: Sep 2010
Posts: 12,692
Likes: 6
From: Mercer County, NJ
Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
I heard rumors that Pennzoil that's made or distributed in the west sludged cars almost all the time. Something they used
Junior Member
Joined: Apr 2015
Posts: 31
Likes: 1
From: Amarillo, TX
Year: 1998
Model: Grand Cherokee
Engine: 4.0
I just came to watch the OP blow up and the fireworks after. I was a little late. Disappointing. My 4.0 has 207k no clue what was ran before and i run the autozone special 5w-30. When it gets dark i change it. Trail rig only. Seems to work fine for me.
It looked like continuing this discussion was being discouraged so I explained my biased statement to salad via PM:
Good morning friend, I owe you an answer to your request to elaborate
I have to admit that I discourage using Pennsoil because I am still in Sludge grudge boycott mode from the days when they were paraffin based. They knew they had an issue yet refused to admit it or address it for many many years and I guess am still mad at them about this. I pulled far too many rocker covers to find so much pennsoil sludge built up inside that it looked like the rocker cover was still there
Reply Posted by salad:
Howdy there,
Ah, I see! They've made quite the turnaround - in fact they are now one of the best in the conventional segment, with the lowest wear and some of the cleanest engines! The only sludge I've ever seen, with any oil, (personally) was either due to neglect or a Chrysler 2.7L V6
Old habits die hard I suppose.
Cheers
Re-Reply posted by myself this morning:
I don't doubt that Pennsoil may be a decent product now and it is not so much the product I detest but their "slimy" corporate practices over the years. A better way to put it might be "Old Political Grudges die hard" Seriously, I witnessed it personally, Pennsoil and Quaker State oils were so bad for 25 years through the 70s, 80s and early 90s that they were actually destroying engines. At less than 200k the oil galleys, lifter ports and push tubes would start plugging up. It would even cook and glue the rings down into the grooves and start losing compression. All this they blamed on the consumer even though they knew it was actually their product causing the problems. They insulted and refuted the intelligence and knowledge of the experts who were tearing down these engines and finding these issues.
I am heavy into politics and believe "boycotting" is the only power we still retain to truly repair some of the problems in this country. The automotive repair industry boycotting Pennsoil might be why they now have a decent product! Everybody like myself ended up discouraging their customers from using it so they were finally forced to fix the issue. So it is good to hear the efforts of old hard headed farts like myself made a difference! lol.


