Zinc in Rotella T

[Dick W.]

Re: Zinc in Rotella T

I am due to send another sample off the next oil change. I will post the results then.

[Dick W.]

Re: Zinc in Rotella T

Updated oil sample analysis. CJ-4 this time. Not happy about the fuel dilution, but have taken care of that, programmer was set at the highest level.

[Paul J.]

Re: Zinc in Rotella T

Updated oil sample analysis. CJ-4 this time. Not happy about the fuel dilution, but have taken care of that, programmer was set at the highest level.

Dick, thanks for posting this. There's nothing like the facts.

Paul

[Duke W.]

Re: Zinc in Rotella T

...but...but everyone on the intenet says they took all the zinc out of diesel oil.

Duke

[Carnell M.]

Re: Zinc in Rotella T

It's always good to know the REAL facts. Dick, do you know if the CJ-4 rating includes the Rotella 10-30 also. Just curious. Heard some people touch on the subject but didn't see an answer anywhere.

[Michael D.]

Re: Zinc in Rotella T

Anybody ever hear of "Cam-Shield"? www.cam-shield.com ZDDP-"Zinc Antiwear for Classic cars and Hot rods"
Central New Jersey Chapter had a speaker come in and discussed this product in length. Sounded logical. I havent tryed it yet, when my motor is done I will.

[Adam S.]

Re: Zinc in Rotella T

haven't heard of cam shield, but I just got finished with break in on 283/ 370 hp solid lift original cam I am using Rotella, no problems with flat lobes, I did a second lifter adjustment , all staying put, no problems so far, other than the smell of this type of oil, I have no problems with it ......

[Russ S.]

Re: Zinc in Rotella T

It's always good to know the REAL facts. Dick, do you know if the CJ-4 rating includes the Rotella 10-30 also. Just curious. Heard some people touch on the subject but didn't see an answer anywhere.

Yes it does. I have 4 cases of 10-30 Rotella t and it has the CJ-4 rating.

[Duke W.]

Re: Zinc in Rotella T

Anybody ever hear of "Cam-Shield"? www.cam-shield.com ZDDP-"Zinc Antiwear for Classic cars and Hot rods"
Central New Jersey Chapter had a speaker come in and discussed this product in length. Sounded logical. I havent tryed it yet, when my motor is done I will.

You're wasting your money. If you use CJ-4 you don't need any ZDDP additive other than GM EOS being optional for breakin.

My local chapter was also going to bring in some oil addtive guy. Instead, I did the presentation and presented our members with the FACTS, and this lead to the engine oil article in the Summer 2008 Corvette Restorer, which was also reprinted here beginning on page 3:

http://www.westcoastwillys.com/WCW_Sept08_small.pdf

No doubt the guy told you about the ZDDP reduction in current S-category oils, and I'll bet a hundred bucks that he didn't say a word about C-category oils which currently have about the same amount as S-category oils before the S-category limitation went into effect beginning with SL.

Duke

[Duke W.]

Re: Zinc in Rotella T

Chevron also offers Delo LE CJ-4 in a 10W-30 viscosity grade.

Duke

[Adam S.]

Re: Zinc in Rotella T

Duke, as always, wounderfull to here facts with no fiction about the slipery dinosaur stuff , especially in this world we live in , not like the one I knew and I am considered a spring chicken in my age group compaired to you older(wiser) men.

[Michael F.]

Re: Zinc in Rotella T

I think some will go to any length to prove their oil choice is the best one.

1300PPM is plenty.

With all due respect to the OP. The results or whether the test was actually done is in serious question here.IMHO

Nothing in this thread would change me from Rotella.

If ANYONE, here or on any other Forum. Has ANY proof of a gasoline racing or non racing engine failure due to the choice of the oil?

Please present your REAL PROOF, not theory or second hand info. Right here and right now.

I have presented this question on multiple Forums. NO TAKERS.

[Duke W.]

Re: Zinc in Rotella T

There's really no way to tell without conducting a rigorous scientific investigation, and how many guys on internet discussion boards have the knowledge or resources to conduct such testing and failure analysis?

Usually what you get it a statement like: "I use Super-Duper Snake Oil and it works great" . So how do they know it wouldn't work great without the Snake Oil? (This applies to virtually all additives, be they oil, coolant, gasoline, etc.)

A well run in vintage OE engine will probabaly not have any problems using current S-category oil, which has about the same amount of ZDDP as fifties vintage oils. The amount was increased and reached a peak about 50 percent greater in the seventies, and this carried through until the first limitation in SL back in the early 2000s. CJ-4 has about the same amount as those pre-SL oils, most of which were dual rated for both spark and diesel engine service. CJ-4 costs about the same as S-category oil and is readily available at auto parts and big box stores, so the answer should be obvious.

Duke

[Steve V.]

Re: Zinc in Rotella T

Is there any reason not to use a CJ-4 oil in a newer (2005) engine with high mileage?
Steve

[Joe R.]

Re: Zinc in Rotella T

Is there any reason not to use a CJ-4 oil in a newer (2005) engine with high mileage?
Steve

Steve,

I suspect it will ruin your catalytic converter. What does the owner's manual suggest for oil?

Joe