Rotella: The world's first ever combined hair oil, foot ointment, and salad dressing
#826
THE Admin
Join Date: Sep 2010
Location: Lantana, Fl
Posts: 34,036
Received 231 Likes
on
187 Posts
Year: 1996
Model: Cherokee (XJ)
Engine: 4.Slow
Ok, I'm trying really damn hard here to be nice and even took the time to sift through this whole damn thread to eliminate any unwarranted BS, so here's the deal...If you don't like it, DON'T USE IT! Now is that soo hard of a concept?! I don't think so.
Secondly, IF you don't like something that others do, that goes for oils, lift kits, tires or whatever, don't flat out bash. You need to state why and come with evidence of why. If not it comes off as this, "Well Billy, I see you lifted your XJ but didn't buy the brand I like and bought all terrain tires instead of crawlers. You really screwed that Jeep up and need to sell it."
So last warning. Being respectful to others here really isn't up for debate either.
Secondly, IF you don't like something that others do, that goes for oils, lift kits, tires or whatever, don't flat out bash. You need to state why and come with evidence of why. If not it comes off as this, "Well Billy, I see you lifted your XJ but didn't buy the brand I like and bought all terrain tires instead of crawlers. You really screwed that Jeep up and need to sell it."
So last warning. Being respectful to others here really isn't up for debate either.
#827
CF Veteran
Here's the skinny on the 429. Some brilliant engineer thought they could make automated assembly easier if they put spit cam bearings in those instead of one piece bearing like they should have. These split bearings would "walk" over a short time and become misaligned from the oil supply hole and starve themselves to death until they spun.
The 429 got a bad rep because of this one flaw. And it's too bad because when proper one piece cam bearings are installed they are probably one of the best engines Ford made because they are a big block but what they call a "square motor" if I remember right. Too bad, I have actually built some and they are bullet proof and hard to beat with the right cam bearings.
The 429 got a bad rep because of this one flaw. And it's too bad because when proper one piece cam bearings are installed they are probably one of the best engines Ford made because they are a big block but what they call a "square motor" if I remember right. Too bad, I have actually built some and they are bullet proof and hard to beat with the right cam bearings.
#829
CF Veteran
#830
THE Admin
Join Date: Sep 2010
Location: Lantana, Fl
Posts: 34,036
Received 231 Likes
on
187 Posts
Year: 1996
Model: Cherokee (XJ)
Engine: 4.Slow
Didn't know Castrol had a diesel specific oil, or at least I have not seen that stuff down here. Got a pic of the jug? The Walmarts here only sell the Delco, Rotella and Quaker State diesel blends.
#832
No, I don't lick fish.
Ok, I'm trying really damn hard here to be nice and even took the time to sift through this whole damn thread to eliminate any unwarranted BS, so here's the deal...If you don't like it, DON'T USE IT! Now is that soo hard of a concept?! I don't think so.
Secondly, IF you don't like something that others do, that goes for oils, lift kits, tires or whatever, don't flat out bash. You need to state why and come with evidence of why. If not it comes off as this, "Well Billy, I see you lifted your XJ but didn't buy the brand I like and bought all terrain tires instead of crawlers. You really screwed that Jeep up and need to sell it."
So last warning. Being respectful to others here really isn't up for debate either.
Secondly, IF you don't like something that others do, that goes for oils, lift kits, tires or whatever, don't flat out bash. You need to state why and come with evidence of why. If not it comes off as this, "Well Billy, I see you lifted your XJ but didn't buy the brand I like and bought all terrain tires instead of crawlers. You really screwed that Jeep up and need to sell it."
So last warning. Being respectful to others here really isn't up for debate either.
Ha! Learn something new every day!
#833
Senior Member
Join Date: Nov 2014
Location: Hacienda Heights
Posts: 603
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1990
Model: Cherokee
Engine: 4.0
Been so long since I saw a Powerstroke referred to as a T444E. My van has it's older IDI brother. Gutless wonder, but it burns everything I pour down its throat. Mechanical Diesel engine, the original flex fuel.
#834
Junior Member
Join Date: Sep 2017
Location: Central NJ
Posts: 58
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1999
Model: Cherokee(XJ)
Engine: 4.0
I didn't read all 500,000 replies, but I will ask this: If the 4.0 engine needs 10w30 oil, and it is as bulletproof as everyone says, then 10w30 Rotella should work just fine, yes?. If someone should use the 15w40 in the dead of winter, it might cause some issues, but in the heat of summer, I assume it will be just fine.
YMMV
Don't shoot the messenger.
KenR
YMMV
Don't shoot the messenger.
KenR
Last edited by KenR; 12-22-2017 at 09:29 AM. Reason: Spelling
#836
CF Veteran
That stuff is junk. Evidence; it doesn't say Rotella on the jug. I'll bet your poor 4.0 doesn't even make half million miles running that garbage which will prove that you're totally dumb for using it. Please tell me I don't need to insert a smiley, that would totally ruin it.
Been so long since I saw a Powerstroke referred to as a T444E. My van has it's older IDI brother. Gutless wonder, but it burns everything I pour down its throat. Mechanical Diesel engine, the original flex fuel.
Been so long since I saw a Powerstroke referred to as a T444E. My van has it's older IDI brother. Gutless wonder, but it burns everything I pour down its throat. Mechanical Diesel engine, the original flex fuel.
I didn't read all 500,000 replies, but I will ask this: If the 4.0 engine needs 10w30 oil, and it is as bulletproof as everyone says, then 10w30 Rotella should work just fine, yes?. If someone should use the 15w40 in the dead of winter, it might cause some issues, but in the heat of summer, I assume it will be just fine.
YMMV
Don't shoot the messenger.
KenR
YMMV
Don't shoot the messenger.
KenR
#837
Senior Member
Join Date: Jan 2012
Posts: 952
Likes: 0
Received 3 Likes
on
3 Posts
Year: 2004
Model: Grand Cherokee
Engine: 2000 4.0
A buddy of mine had one of those old idi 7.3s, not much power but it they will run forever, and when you got on it it sounded more like big block gas engine than a diesel.
I have no issues running 15w40 in 20 degree weather, and yes 10w30 Rotella would be fine to use. The 4.0 originally specd as high as 20w50, 10w30 is the lightest I would run in a 4.0.
I have no issues running 15w40 in 20 degree weather, and yes 10w30 Rotella would be fine to use. The 4.0 originally specd as high as 20w50, 10w30 is the lightest I would run in a 4.0.
#838
CF Veteran
Join Date: Feb 2016
Location: Northern New Mexico
Posts: 3,683
Likes: 0
Received 7 Likes
on
6 Posts
Year: 1999
Model: Cherokee
Engine: 4.0
I find it very funny to hear all this obsession over oil. The 4.0 has survived on every type of oil thrown at it. The reason for thinner oil in winter is for easier starting. Oil pressure will start to build as soon as engine starts. The rockers are SQUIRT lubricated and it may take several MINUTES for oil to reach them regardless of oil weight but so what? There is enough residual oil to lubricate adequately until oil flow is established. Even after the engine has sat for a long time all moving parts are coated with a film of oil.
#839
Senior Member
Of course back then we didn't have the low ZDDP problem to deal with, but that seems to be an issue mainly when in breaking in new cams or with high-performance engines using extra-stiff valve springs. (I do use Rotella T6 in my own XJ mainly since so many here recommended it but I'm sure any quality oil would do just as well.)
So pay your money for what you like, say a voodoo prayer over it, and carry on.
#840
CF Veteran
FWIW, back in the 1980s and early 1990s I worked in the computer department of a major oil company's R&D lab and had the opportunity to work with their lubrication engineers. Their opinion at the time was that if you changed your oil and filter every 3K miles it didn't matter what oil you used as long as it wasn't some unknown cut-rate garbage. (The exception being turbocharged engines, where synthetics were recommended due to their superior heat resistance. Also synthetics were recommended if you wanted longer drain intervals.) A number of different makers' cars using a lot of different oils were stress-tested, then torn down and analyzed. I don't specifically remember any XJ 4.0s but given the Jeep's popularity I expect there were some.
Of course back then we didn't have the low ZDDP problem to deal with, but that seems to be an issue mainly when in breaking in new cams or with high-performance engines using extra-stiff valve springs. (I do use Rotella T6 in my own XJ mainly since so many here recommended it but I'm sure any quality oil would do just as well.)
So pay your money for what you like, say a voodoo prayer over it, and carry on.
Of course back then we didn't have the low ZDDP problem to deal with, but that seems to be an issue mainly when in breaking in new cams or with high-performance engines using extra-stiff valve springs. (I do use Rotella T6 in my own XJ mainly since so many here recommended it but I'm sure any quality oil would do just as well.)
So pay your money for what you like, say a voodoo prayer over it, and carry on.
One was a study of a set of NYC taxi cabs. They broke the motors all the way down, measured the current condition of all of the parts, from the crank to the cam and everything in-between. Then put them back together. Then using the same quality oil, then half the cars they broke back down after 3000 miles exactly. And remeasured...the other half they broke down at 5000 miles and measured everything again too.
And what they found... there was no more wear on the cars that went 5000 miles than those that went 3000 miles. And we all know that NYC taxi cabs are probably among some of the hardest used cars around in those conditions. I'd say that's a pretty controlled real world test.
Last edited by RocketMouse; 12-23-2017 at 11:07 PM.