drum roll please !!! high OCI on CJ

[JHardwick]

I guess I'm petty happy with these results. All samples have been with Rotella, the last 2 with CJ rated oil. 90% of my miles are towing, and this last sample got pretty hot once in the Rockies.

 

[steved]

WOW! That's HORRIBLE!!! :-laf



I just had an UOA on CJ-4 with only 8234 miles... came back looking fine as well...



While I can't say the CJ-4 oils are overall good, the Rotella version of this CJ-4 "crap" looks just fine IMO!





steved

 

[JHardwick]

WOW! That's HORRIBLE!!! :-laf



steved

:-laf



I'll have ~15,000 miles on this oil when I get home from this trip. I'll send it in to check on that lead, although I'm not concerned.

 

[steved]

Hmmmm, maybe its time for me to extend out past 10k???

Did you have TBN done by chance?? Mine was still 8. 8 with the 8234 miles on the oil...

steved

 

[05mxdiesel]

Nice wear numbers, lots of variations in fe wear, must be based on the load your carrying.

 

[JHardwick]

Hmmmm, maybe its time for me to extend out past 10k???



Did you have TBN done by chance?? Mine was still 8. 8 with the 8234 miles on the oil...



steved

I'm not sure if I'll go to 26,000 again, but I'm comfortable at 15-20,000. I figure a guy good go 25,000 easily if he never towed



I DID pay for a TBN, I'll have to call about that!

 

[JHardwick]

Nice wear numbers, lots of variations in fe wear, must be based on the load your carrying.

Could be, or maybe even the heat range.



I know this last sample got hot. Either the guy who works on my truck when I'm pressed for time, or myself left a corner of the fan shroud out of it's slot before I headed to the Rockies last time ... ..... it got hot enough for the check gages to come on for the first time ever. I fixed that before I came out here on this trip.

 

[steved]

Could be, or maybe even the heat range.



I know this last sample got hot. Either the guy who works on my truck when I'm pressed for time, or myself left a corner of the fan shroud out of it's slot before I headed to the Rockies last time ... ..... it got hot enough for the check gages to come on for the first time ever. I fixed that before I came out here on this trip.

I was running upwards of 236*F on the last trip a couple times (pulling hills)... I'll be curious to see what the next UOA looks like... but I need bottles first!



I think having the GCF helps in that respect, adding that extra 1. 5 gallons of oil that is getting cooled some and "recycled"...



I'll be curious to see your TBN number...



steved

 

[rbattelle]

Good to know the CJ-4 stuff doesn't seem bad. Curious what the extra lead is all about.

Ryan

 

[JHardwick]

I'll be curious to see your TBN number...



steved

Updated report with TBN ... ... ... ...

 

[JHardwick]

Curious what the extra lead is all about.



Ryan

I'm going to take it at face value until my next sample.

 

[steved]

Hmmm, as suspected... probably get around 35k to 40k on an OCI before TBN became an issue...

And considering most OTR truck only do 25k OCIs, I don't see where the TBN is going to be an issue...

Its not a linear drop for sure... almost "levels out" after a while...

steved

 

[roperteacher]

My NAPA MANAGER finally said he can get the PB classic oil now... Phheeewwwww The CJ oils are just fine but if you have the choice to go with the otherm then I am going to do it...

 

[Gary - K7GLD]

Hmmm, as suspected... probably get around 35k to 40k on an OCI before TBN became an issue...



And considering most OTR truck only do 25k OCIs, I don't see where the TBN is going to be an issue...



Its not a linear drop for sure... almost "levels out" after a while...



steved

Dunno how reliable it is, but the usually accepted yardstick for TBN in used oil indicating need for a change, is when it drops to half of it's original level - which seems to be about where the above report is - but a decent report just the same.

 

[steved]

Dunno how reliable it is, but the usually accepted yardstick for TBN in used oil indicating need for a change, is when it drops to half of it's original level - which seems to be about where the above report is - but a decent report just the same.

All of my whopping two reports indicated a TBN of 1. 0 was the threshold... anything above that was serviceable.



Why would half of the TBN be a yardstick?? If there is still measurable TBN, then the TBN is still capable of neutralizing acids???



steved

 

[Gary - K7GLD]

All of my whopping two reports indicated a TBN of 1. 0 was the threshold... anything above that was serviceable.



Why would half of the TBN be a yardstick?? If there is still measurable TBN, then the TBN is still capable of neutralizing acids???



steved

I have no idea where the half figure was established, but have seen it referred to several times over on the "Bob the oil guy" site. I suppose most guys will select their own threshold as to what's acceptable in their case - as far as I'm concerned, I usually try to stay as far as possible from the edges of cliffs, EGT and other potential danger points - including TBN thresholds - fresh oil is far cheaper than repairing engine damage or premature wear... :-laf



My own extended oil usage with Delo CI lube - 20K - came back with a TBN of 8. 5 as I recall, and pretty close to new stuff right outta the can, and THAT I can live with without question or concern!



YMMV!



(EDIT)



I went back and checked, my 20K TBN was actually 8. 2 - still not bad - here's the report:



#ad

 

[JHardwick]

My NAPA MANAGER finally said he can get the PB classic oil now... Phheeewwwww The CJ oils are just fine but if you have the choice to go with the otherm then I am going to do it...

Don't take this the wrong way, but I'd rather this didn't turn into a CI+4 or Classic Blue thread ... ... ... ..... there are already pages, upon pages, upon pages of that.



Most people don't acknowledge that CJ oil is quality oil, so these threads remain small, but informative.

 

[JHardwick]

My own extended oil usage with Delo CI lube - 20K - came back with a TBN of 8. 5 as I recall, and pretty close to new stuff right outta the can, and THAT I can live with without question or concern!

True, but it's not going to be available much longer, and doesn't CJ oil start out with a lower TBN number anyway? I would say that TBN loss would be more important than the actual number.

 

[Gary - K7GLD]

Don't take this the wrong way, but I'd rather this didn't turn into a CI+4 or Classic Blue thread

I agree - but then too, posting analysis results DOES lead to comparisons, especially since there exists fairly widespread concerns as to the level of engine protection the CJ stuff provides. In your example (undoubtedly offered at least in part to counter those concerns!) and analysis, the CJ seems very adequate in all areas but lead - and that may well simply be a one-time anomaly...

 

[JHardwick]

I agree - but then too, posting analysis results DOES lead to comparisons, especially since there exists fairly widespread concerns as to the level of engine protection the CJ stuff provides. In your example (undoubtedly offered at least in part to counter those concerns!) and analysis, the CJ seems very adequate in all areas but lead - and that may well simply be a one-time anomaly...

I just didn't want to see this turn into another thread about P/N's and availability locations for CI rated oil. I'm not wasting time tracking down a dying breed.

I'd rather determine what brands of CJ oil are decent, and what kind of OCI's can be expected.

Like I said in my opening post, my last 2 samples were CJ, with only the last one showing high lead numbers. The lead will likely go back to normal with this next sample. I'll have 13-14,000 miles on this oil when I get home.