I just put CJ4 in my Kubota tractor. I will use the same in my truck.
My oil analysis just came back with Shell Rotella CJ4 and it was PERFECT!
Try it for 7K or 10 K, then get a better picture as related to how many members have been running the CI4 stuff with good reports.![]()
You mean like this one??
And before anyone chimes in with the iron being slightly elevated, remember this was almost 10k of WINTER driving, some of which was cold start at temps well below zero *F.
Oh, and because the report doesn't state it, this was CJ-4 Rotella 15w40.
steved
One thing *we* seem to forget is the fact that the readings in PPM mean that a bypass filter won't necessarily remove the contaminant... steved
I can't see any negatives, aside from a possibly reduced mileage between oil changes, in using CJ-4 versus CI-4+ which is due to a less robust TBN package to protect the exhaust system. The question is "How great of a reduction in mileage between oil changes?"
http://www.valvoline-technology.com/upload/dynamic/API CJ-4 Heavy Duty Engine Oil.pdf
Quotes from the link
"The performance of CJ-4 is designed to be a
significant upgrade over CI-4 and CI-4 plus
lubricants. "
Benefits of using CJ-4
Improved Soot Handling
- The use of increase EGR creates more soot. To
minimize the negative effects, the soot dispersancy
capability of CJ-4 oils has been boosted.
Improved Oxidation Control
- Higher EGR rates result in increased operating
temperatures that accelerate oil oxidation. CJ-4 oils
have been formulated with improved high temperature
anti-oxidants that reduce oxidation
Superior Valve-train Wear Protection
- CJ-4 oil category includes Cummins B-engine test
that measures the oil's capability to reduce tappet
wear. CJ-4 oils have boosted wear protection for the
mid-range engines.
Backward Compatibility
- CJ-4 oil category is designed to be backward
compatible. It is designed to meet the performance
properties of previous categories and is compatible
with older engines.
Enhanced Low Temperature Pumpability
- API CJ-4 oils must meet new low-temperature
requirements through selected engine tests. This
ensure that they provide better low-temperature
pumpability than previous categories.
Lower Levels of Oil Consumption
- Formulated with superior Group II base-stocks which
helps lower oil volatility
Chevron Delo 400 Multigrade is formulated with ISOSYN™ base stocks, which rival synthetics in critical engine tests and an optimal blend of the latest technology in dispersant, detergent, oxidation inhibition, antiwear, corrosion inhibition, viscosity improver, and defoaming additives.
Those last 4 paragraphs will be interesting to verify as time goes by ...
I find it interesting that you and others here cast aspersions at CJ-4 and I'd like to know just what you and others base your negativity on, aside from the obvious and necessary reduction in TBN to protect the emissions systems. If the company claims CI-4+ backward compatibility, they had to perform the tests to back up the claim.
As to your contention that the first two (Improved Soot Handling and Oxidation Control) aren't applicable on non-EGR engines, I think you're mistaken. If anything, they should theoretically increase the useful life of the oil even in non-EGR engines due to their ability to keep crap (soot handling) out of the system and prevent oxidation of the oil, which happens in non-EGR systems as well. The thing people need to understand about oxidation reactions is their temperature dependency is on a curve, not based on some magic number where at X degrees F it doesn't oxidize, and add 10 degrees and *poof* now it does. Increased high temp stability would also imply increased stability at lower temps as well. That's simple chemistry.