cummins motor oil
#21
MC 15w-40 has been a CJ-4 oil for quiet a while now...
SAE 15W-40 Super Duty Diesel Motor Oil
With a TBN of 8.4...
http://www.fcsdchemicalsandlubricant...per%20Duty.pdf
Honestly, IMHO, I would not get too worked up over the CI vs CJ-4 stuff. Yes TBN has dropped from the older to newer spec but most of the acidity in a diesel's crankcase came from blow by and the sulfur in the fuel and exhaust...well with ULSD and sulfur levels dropping from 500ppm to 15ppm (a drop of a mere 97%)...the TBN advantage of CI-4 is totally moot.
Now there has been a drop in Zinc and phosphorus, two long time fan favorite anti-wear additives but most oil companies have increased the use of other anti-wear additives like boron, molybdenum and in some cases titanium. Also CJ-4 oils are designed to handle far more advanced EGR than CI-4 oils and thus handle soot better, which also helps control wear.
I am not saying CJ-4s are perfect by any means, I am just saying they are even as close to as bad as many people claim they are.
Good site for motor oil talk...
Bob Is The Oil Guy - Forums powered by UBB.threads™
SAE 15W-40 Super Duty Diesel Motor Oil
With a TBN of 8.4...
http://www.fcsdchemicalsandlubricant...per%20Duty.pdf
Honestly, IMHO, I would not get too worked up over the CI vs CJ-4 stuff. Yes TBN has dropped from the older to newer spec but most of the acidity in a diesel's crankcase came from blow by and the sulfur in the fuel and exhaust...well with ULSD and sulfur levels dropping from 500ppm to 15ppm (a drop of a mere 97%)...the TBN advantage of CI-4 is totally moot.
Now there has been a drop in Zinc and phosphorus, two long time fan favorite anti-wear additives but most oil companies have increased the use of other anti-wear additives like boron, molybdenum and in some cases titanium. Also CJ-4 oils are designed to handle far more advanced EGR than CI-4 oils and thus handle soot better, which also helps control wear.
I am not saying CJ-4s are perfect by any means, I am just saying they are even as close to as bad as many people claim they are.
Good site for motor oil talk...
Bob Is The Oil Guy - Forums powered by UBB.threads™
#22
#23
CJ-4 spec puts a limit on Zinc and Phosphorus, two additives which protect your engine from wear and higher levels were eliminated due to pressure from EPA.
Calcium and Magnesium are what control acid caused from soot deposits, and CJ-4 has a lower TBN oil due to a MANDATE that it is to be compatible with modern emissions controls.
You make a point about ULSD that has some truth, but that is not why they had to reduce levels of additive. A simple switch in fuel does not mean you must downgrade your oil.
Not saying CJ-4 is a down grade.. this is not a debate about CI-4 vs CJ-4 in general.
Pressure from EPA and manufacturers to force compliance with new EGR technologies is what made the change happen.
CJ-4 simply limits additives, the real debate has to do with the oil those additives are added to since there were some changes in base stocks.
Less additive does not make an oil BETTER. Again, not a debate between CI-4 and CJ-4.
Manufacturers changed the base oil from group II to group II+ and in some cases group II+ with added group III. II+ is simply a highly processed group II, the group II we've been using for years. If you've bought oil in the last 10 years that was petroleum derived you were running group II. The last few years most every oil on the shelf has been formulated using group II+, an improvement in the base oil that better protects from wear and is more sheer stable.
THE TRUTH is this improved base stock is a large part of the reason for CJ-4 oils looking "good", after-all your base oil is the foundation of your motor oil.
There is no hocus pocus in motor oil, everything is laid out in a scientific method, just read the data.
I'm know you would agree a new group II+/group III oil formulated at CI-4 levels would be an AWESOME oil. Well, my point is there were CI-4 oils which used improved basestocks before the switch to CJ-4. The only thing that *changed* was a slight reduction of TBN additives and anti-wear additives as dictated by API.
I've also discussed the details of motor oil with people in the industry, in person, for hours, just to verify my own understanding. The internet is good, but good ol face to face can be better. I've never formally studied tribology but a tribologist who knows more than I ever will told me that my understanding is correct and spot on.
This was after I spent hundreds of hours studying oil and the different characteristics that make up a good engine oil and a great engine oil. I have a decent understanding of why one is better than the other, but often times people argue because they are brand loyal and want to continue using what they've used for years.
It's like watching a bunch of teenagers argue Ford vs Chevy.
Well, I've owned them all.
Loyalty is important to me, too, but to be honest I want the best oil for my engine and I will not settle for something less. Of course it is all relative, I want the best oil at what I see as a "reasonable price".
For me, it is Mystik JT-8 15w40 / 15w50 for summer use.
Look, I'll level with you guys.
We are all in this to help each other and learn, at least that I why I am here.
I will share everything I know with you in order to help the best I can, because when I need help I will be the first to ask when I realize it's something that requires attention to detail. I'm looking to do some fine tuning to my pump and I will probably consult someone who has more experience fine tuning to get minimal smoke and maximum torque. I've got a new #10 fuel plate to install before I make any more adjustments.
I've said my piece in this discussion.
Mystik JT-8 synthetic blend takes the cake, 25-30 dollars for 2 gallon containers.
You have your pick of 15w40 or 15w50.
Enjoy and y'all take care.
Last edited by wildbill; 01-29-2012 at 10:10 AM. Reason: No reason for that....
#24
That is true however there is still some CI-4 available, and I bought some a few weeks ago AT WALMART. It has a starting TBN of 14 and more Zn and P.
CJ-4 spec puts a limit on Zinc and Phosphorus, two additives which protect your engine from wear and higher levels were eliminated due to pressure from EPA.
Calcium and Magnesium are what control acid caused from soot deposits, and CJ-4 has a lower TBN oil due to a MANDATE that it is to be compatible with modern emissions controls.
You make a point about ULSD that has some truth, but that is not why they had to reduce levels of additive. A simple switch in fuel does not mean you must downgrade your oil.
Not saying CJ-4 is a down grade.. this is not a debate about CI-4 vs CJ-4 in general.
Pressure from EPA and manufacturers to force compliance with new EGR technologies is what made the change happen.
CJ-4 simply limits additives, the real debate has to do with the oil those additives are added to since there were some changes in base stocks.
CJ-4 spec puts a limit on Zinc and Phosphorus, two additives which protect your engine from wear and higher levels were eliminated due to pressure from EPA.
Calcium and Magnesium are what control acid caused from soot deposits, and CJ-4 has a lower TBN oil due to a MANDATE that it is to be compatible with modern emissions controls.
You make a point about ULSD that has some truth, but that is not why they had to reduce levels of additive. A simple switch in fuel does not mean you must downgrade your oil.
Not saying CJ-4 is a down grade.. this is not a debate about CI-4 vs CJ-4 in general.
Pressure from EPA and manufacturers to force compliance with new EGR technologies is what made the change happen.
CJ-4 simply limits additives, the real debate has to do with the oil those additives are added to since there were some changes in base stocks.
Less additive does not make an oil BETTER. Again, not a debate between CI-4 and CJ-4.
Manufacturers changed the base oil from group II to group II+ and in some cases group II+ with added group III. II+ is simply a highly processed group II, the group II we've been using for years. If you've bought oil in the last 10 years that was petroleum derived you were running group II. The last few years most every oil on the shelf has been formulated using group II+, an improvement in the base oil that better protects from wear and is more sheer stable.
THE TRUTH is this improved base stock is a large part of the reason for CJ-4 oils looking "good", after-all your base oil is the foundation of your motor oil.
There is no hocus pocus in motor oil, everything is laid out in a scientific method, just read the data.
I'm know you would agree a new group II+/group III oil formulated at CI-4 levels would be an AWESOME oil. Well, my point is there were CI-4 oils which used improved basestocks before the switch to CJ-4. The only thing that *changed* was a slight reduction of TBN additives and anti-wear additives as dictated by API.
Manufacturers changed the base oil from group II to group II+ and in some cases group II+ with added group III. II+ is simply a highly processed group II, the group II we've been using for years. If you've bought oil in the last 10 years that was petroleum derived you were running group II. The last few years most every oil on the shelf has been formulated using group II+, an improvement in the base oil that better protects from wear and is more sheer stable.
THE TRUTH is this improved base stock is a large part of the reason for CJ-4 oils looking "good", after-all your base oil is the foundation of your motor oil.
There is no hocus pocus in motor oil, everything is laid out in a scientific method, just read the data.
I'm know you would agree a new group II+/group III oil formulated at CI-4 levels would be an AWESOME oil. Well, my point is there were CI-4 oils which used improved basestocks before the switch to CJ-4. The only thing that *changed* was a slight reduction of TBN additives and anti-wear additives as dictated by API.
Take it easy
---AutoMerged DoublePost---
Geez guys...we are talking motor oil....it is not like we are talking about something important like beer.
Last edited by rufushusky; 01-27-2012 at 07:32 PM. Reason: Automerged Doublepost
#25
I thought I got lucky and found something rare, that was my error.
Upon closer inspection you can see the letters are so close together when I turned the bottle over to read it I saw it as CI-4. It's also marked CI-4 Plus, but of course the top designation over-rides it. Wishful thinking on my part!!
What's funny is I looked at the API label only and CJ-4 is also specified below but all I look at is the API label.
Right again on the additives, though Zinc and Phosphorus are most prevalent.
And as you probably know Rotella has absolutely 0 Moly.
For example, added anti-wear additives ain't worth diddly if your running 5-7.5k assuming reasonable operating environment cause your dumping the oil long before the additives or TBN has been consumed. At least based on what I have seen on UOAs, your wallet cares more about what oil your running than your engine...but of course that is just my opinion.
I too do-not run my oil to the point that it's barely adequate.
Bingo on the wallet, I want the best bang for the buck, which is why I like JT-8.
A synthetic blend for the same money, and it's available in 15w50 diesel formulation!
You might take a serious look at it, in fact I might have it analyzed just so I can get people running a semi-synthetic for the same money.
Analysis would be worth it. From what I've seen in the past they DO-NOT skimp on additives. Prior to CJ-4, Mystik JT-8 had a very robust additive package.
Have you ever taken a look at JT-8?
What do you run now?
If I can convert some people it will have been worth the effort
Would be too bad if it went off the market because not enough people were buying it.
You're lucky I'm not a preacher preachin' the good word..
Cheers
Last edited by Gunmetal; 01-28-2012 at 02:06 AM.
#26
I too do-not run my oil to the point that it's barely adequate.
Bingo on the wallet, I want the best bang for the buck, which is why I like JT-8.
A synthetic blend for the same money, and it's available in 15w50 diesel formulation!
You might take a serious look at it, in fact I might have it analyzed just so I can get people running a semi-synthetic for the same money.
Analysis would be worth it. From what I've seen in the past they DO-NOT skimp on additives. Prior to CJ-4, Mystik JT-8 had a very robust additive package.
Have you ever taken a look at JT-8?
What do you run now?
If I can convert some people it will have been worth the effort
Would be too bad if it went off the market because not enough people were buying it.
You're lucky I'm not a preacher preachin' the good word..
Cheers
Bingo on the wallet, I want the best bang for the buck, which is why I like JT-8.
A synthetic blend for the same money, and it's available in 15w50 diesel formulation!
You might take a serious look at it, in fact I might have it analyzed just so I can get people running a semi-synthetic for the same money.
Analysis would be worth it. From what I've seen in the past they DO-NOT skimp on additives. Prior to CJ-4, Mystik JT-8 had a very robust additive package.
Have you ever taken a look at JT-8?
What do you run now?
If I can convert some people it will have been worth the effort
Would be too bad if it went off the market because not enough people were buying it.
You're lucky I'm not a preacher preachin' the good word..
Cheers
Take it easy good sir.
#30
Mystik is a Citgo subsidiary/product. They are in bed with that Venezuelan dictator, supplying free heating oil for the slave labor down there.
Money spent on Mystik/Citgo products supports a brutal South American dicatorship. There's lots of other good or better lubricants out there with U.S. interests behind them.
Money spent on Mystik/Citgo products supports a brutal South American dicatorship. There's lots of other good or better lubricants out there with U.S. interests behind them.
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Benjamin (01-28-2012)