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94-98 Performance Parts Discussion Discussion of Performance Parts For the 94-98 Trucks No Advertising ...NO ADVERTISING

Thread: Best Oil To use and Additives Reply to Thread
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  Topic Review (Newest First)
10-17-2019 03:00 PM
Fire god So.....
Back to the PDD Oil.
Full circle and congratulations!
10-17-2019 01:57 PM
dauntless89 You guys are right, it's the CI-4 that's really most ideal for aftertreatment-free trucks.

However, wear metal generation got much worse going from CJ-4 to CK-4 than it did from CI-4 to CJ-4.
10-17-2019 10:37 AM
98whitelightnin CI-4 was the stuff we used previous to 2007 when all the emission stuff hit big time. CJ-4 was designed for emissions, which we donít have. Iím by no means any kind of expert on oil.
10-17-2019 09:43 AM
Originally Posted by 98whitelightnin View Post
Iím gonna give some of that fancy CI-4 stuff from @dauntless89 place of employment a try next change.
Is ci-4 better than cj-4?
10-17-2019 12:17 AM
98whitelightnin Iím gonna give some of that fancy CI-4 stuff from @dauntless89 place of employment a try next change.
10-16-2019 10:51 PM
Originally Posted by Fire god View Post
Until you're the .2

Nobody in the 12v boards needs CK-4. In fact, they would do well to stay away from it.

Emissions-compliant 4th Gens are what need it.
10-16-2019 09:47 PM
Originally Posted by Destroked 450 View Post
Originally Posted by alanack6795 View Post
Sulfer is not a lubricant. When it burns its a poison. The process of removing sulfur from diesel fuel also removes some of the lubricating properties.
Then thet add more lubricants to the fuel.

If there was a problem with the fuel not lubricating we would have masses of old trucks losing fuel pumps and injectors.

My neighbors cat 3406B has been chugging for over a million miles since before the 5.9 was even designed. Original fuel pump.
Actually the 5.9 Cummins was introduced at the same time has the Cat 3406B.
5.9 was introduced in 1984 for Case industrial equipment.
Cat 3406B was introduced in 1984 as a upgrade of the 3406A that was introduced around 1974
Your neighbors must be a later model 3406B because Cat had a issue with check valves coming loose on the early models, later fuel pumps had the check valves staked in to prevent them from popping loose.

When the first low sulfur fuels came out the Cummins engines with the PT pumps had issues with throttle shaft seal failures, Cummins introduced a improved seal design that eliminated the issue, although there where lots of rumors about accelerated component wear and failures I don't know of any that was proven to be directly related to LSF or ULSF.

I had personal experience with Cat fuel pump check valves and Cummins PT pump seal failures during those time periods
Drove and owned semis from 1978 till 2008, 3406A, 3406B, C15 Cats, VT903T, Big Cam 3 Cummins, 8V71, Series 60 Detroits.
We had to change a couple seals on the "fuel pumps ". Other than that its been fine.

All of our trucks held out fine when ulsd came out. Mostly dt466/dt530s and 8.3 cummins. Couple weird issues here in there with the p pumps but not really.

We bought some newer internationals with maxxforces and they go through injectors and pumps like crazy.
10-16-2019 09:19 PM
Fire god Until you're the .2
10-14-2019 07:07 PM
GAmes For 99.8% of Cummins owners, CJ-4 is just fine.
10-14-2019 07:06 PM
dauntless89 It's much better than CK-4...
10-14-2019 06:14 PM
dohyde34 So I work at a place where I get free mobil 1 full synthetic 5-40 cj-4 oil. Is the cj-4 fine to use in our trucks?
10-07-2019 07:21 AM
ofelas My '91.5z is sometimes accompanied by the smell of burning brimstone...

This may be a remedy?
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