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Old 09-07-2007, 09:06 AM   #13 (permalink)
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Rotella 15/40 and Fleetguard filter
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Old 09-07-2007, 09:13 AM   #14 (permalink)
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amsoil

i run amsoil front to back also.. cant beat it..
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Old 09-07-2007, 10:15 AM   #15 (permalink)
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Originally Posted by mud sweat and gears View Post
Amsoil 5/30 with Amsoil filter, thanks to Chuck
Right on. Thanks!
-Chuck
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Old 09-07-2007, 11:52 AM   #16 (permalink)
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Rotella 15w40 CI-4 or CJ-4, mopar filters (rebadged fleetguards), and a paper towel bypass filter. You can run any brand-name oil in a Cummins and it will perform well...they are very easy on oil.

Several of us have used oil analyses (UOAs) on CJ-4 Rotella 15w40 with good initial results...so don't let the CI/CJ worry you too much as long as you stay within the recommended oil change intervals (OCIs)...besides, within a short time, CI-4 will be fairly difficult to find as manufactures make the changeover and discontinue production of CI-4.

I may change over to Mystic oil some time in the not to distant future...

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Old 09-07-2007, 01:01 PM   #17 (permalink)
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CJ-4 meets all CI-4 specs anyway. Its just the CJ-4 has additives to meet requiremnts for the new diesels.
Always read the bottle and you can't go wrong. Don't forget filter is as important as the oil. Use fleetgaurd or wix. JUST SAY NO to FRAM. I like that maybe I'll make it part of my sig.
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Old 09-07-2007, 01:09 PM   #18 (permalink)
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CJ-4 meets all CI-4 specs anyway. Its just the CJ-4 has additives to meet requiremnts for the new diesels.
Not true. The CJ-4 oils are a compromise to allow particulate exhaust filter equipped vehicles meet emissions. CI-4+ oils have better (heavier) base stocks (higher TBN number on analysis) than CI-4 oils. If you don't have a particulate exhaust filter (Cummins 6.7 has them, 5.9 trucks don't) then you are getting a better oil if you can find CI-4 grade. Manufacturers just say that they are backwards compatible (which they are, but not the same durability of oil base stocks) because they don't want you to avoid their product. TDR did a comparision on CJ-4 oils and CI-4 oils, and while they are compatible, they are not equal at this point. This is why AMSOIL continues to produce CI-4+ and CJ-4 oils separately. The better base stocks in CI-4+ oils allow longer drain intervals that the CJ-4 oils cannot.

-Chuck
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Old 09-07-2007, 01:15 PM   #19 (permalink)
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Delo 400.

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Old 09-07-2007, 02:16 PM   #20 (permalink)
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Royal Purple 15W40
Royal Purple Max Gear for the diffs
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Old 09-07-2007, 04:38 PM   #21 (permalink)
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Quote:
Originally Posted by Duluth Diesel View Post
Not true. The CJ-4 oils are a compromise to allow particulate exhaust filter equipped vehicles meet emissions. CI-4+ oils have better (heavier) base stocks (higher TBN number on analysis) than CI-4 oils. If you don't have a particulate exhaust filter (Cummins 6.7 has them, 5.9 trucks don't) then you are getting a better oil if you can find CI-4 grade. Manufacturers just say that they are backwards compatible (which they are, but not the same durability of oil base stocks) because they don't want you to avoid their product. TDR did a comparision on CJ-4 oils and CI-4 oils, and while they are compatible, they are not equal at this point. This is why AMSOIL continues to produce CI-4+ and CJ-4 oils separately. The better base stocks in CI-4+ oils allow longer drain intervals that the CJ-4 oils cannot.

-Chuck

And just a couple things...it is correct, CJ-4 is backwards compatible, but that doesn't mean it is the same or similar as CI-4.

The TDR article has been under A LOT of criticism on TDR...most are saying the only thing it compared was VOA (virgin oil analyses), and while the "expert" was able to pick out the CJ-4 oils, it only means the oils are different, has no bearing on ANY of the actual oils' performance...I mean, come on Chuck, they rated Amsoil low (do you think that was a realistic opinion?).

And further, WE DO NOT KNOW how the CJ-4 oils are going to hold up. For those of us doing the recommended OCI (15k or less), there will be no issues (based on current UOAs of CJ-4 Rotella).

As I noted on TDR, we are still in the "old school" oil analysis phase...these newer oils might have components that a normal UOA/VOA wouldn't necessarily show. I'm sure some of Amsoil's proprietary stuff doesn't show in a typical UOA... And because of this potential discrepency, the CJ-4 oils may perform just as well as the older CI-4s, but might not show it in a VOA.

And Chuck, one of the "marketing points" of CJ-4 Rotella is the fact they changed to a better base stock (Group III?) compared to CI-4. Just FYI...

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Old 09-07-2007, 05:50 PM   #22 (permalink)
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And just a couple things...it is correct, CJ-4 is backwards compatible, but that doesn't mean it is the same or similar as CI-4.

The TDR article has been under A LOT of criticism on TDR...most are saying the only thing it compared was VOA (virgin oil analyses), and while the "expert" was able to pick out the CJ-4 oils, it only means the oils are different, has no bearing on ANY of the actual oils' performance...I mean, come on Chuck, they rated Amsoil low (do you think that was a realistic opinion?).

And further, WE DO NOT KNOW how the CJ-4 oils are going to hold up. For those of us doing the recommended OCI (15k or less), there will be no issues (based on current UOAs of CJ-4 Rotella).

As I noted on TDR, we are still in the "old school" oil analysis phase...these newer oils might have components that a normal UOA/VOA wouldn't necessarily show. I'm sure some of Amsoil's proprietary stuff doesn't show in a typical UOA... And because of this potential discrepency, the CJ-4 oils may perform just as well as the older CI-4s, but might not show it in a VOA.

And Chuck, one of the "marketing points" of CJ-4 Rotella is the fact they changed to a better base stock (Group III?) compared to CI-4. Just FYI...

steved

If the TDR article would have included a CI-4 AMSOIL product we would have seen how the CJ-4 oil isn't the same. And even though Rotalla CJ-4 finally came up to Group III (mineral oil based) it still is no Group IV that all AMSOIL products are. IMO, and I stand behind my earlier post, AMSOIL CJ-4 oils will likely outperform conventional or only Group III CI-4 oils. But AMSOIL's CI-4 oils will outperform and outlast their CJ-4 offering. That's why, since I have no particulate exhaust filter, I continue to run CI-4 AMSOIL and why AMSOIL continues to produce CI-4+ oils (AME, HDD) that are Group IV true synthetic, not Group III Mineral oil bases that claim to be "synthetic."

-Chuck
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Old 09-07-2007, 06:16 PM   #23 (permalink)
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My point was just as you argued...the test was flawed.

And as you just indicated, the base of Rotella was IMPROVED, it did not go the other way as you indicated in your previous post. And they don't claim to be synthetic...only conventional.

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Old 09-07-2007, 06:22 PM   #24 (permalink)
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The vast majority of Group III oils claim to be synthetic, as you are already aware Steved. And yep, the test was flawed. But early on with the CJ-4 oils, even AMSOIL stated that CI-4 oils were superior and CJ-4 oils were a compromise to meet emissions.
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