Why no Moly in Delvac, etc.

[Strjock81]

I noticed everyone goes giddy over moly in their favorite dino oil, but why isn't moly included often in synth diesel oils? Does the synthetics' properties make its addition redundant? I will be switching back to dino more than likely come warmer weather, which of them have moly, and is it really something to look for?

2004.5 Cummins "600" fuel guzzler, leaking injector machine.

 

[Arup]

I was always under the impression that Delvac always contained Moly but the newer CI-4 rated MX apparently doesnt have any, the Super does though.

 

[medic]

When API SL came to be, the zinc / phosphorus in the gasoline engine oils was dropped to phosphorus and continued to keep them up in the 1300 ppm range.

Many cheaper gasoline oils and one high end synth oil still use no moly. Moly is slowly becoming more common in Diesel oils.

This is the little bit of info I know on this subject. Someone else may have more to offer.

 

[salesrep]

There are several threads on Moly here are two.
http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=1;t=007971
http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=1;t=008548

 

[Mickey_M]

quote:

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Originally posted by Strjock81:
I noticed everyone goes giddy over moly in their favorite dino oil, but why isn't moly included often in synth diesel oils? Does the synthetics' properties make its addition redundant? I will be switching back to dino more than likely come warmer weather, which of them have moly, and is it really something to look for?

---

You'll notice the same oils with little or no moly have fair amounts of magnesium, which you won't find in the same oils that have a lot of molybednum. Take a look at Delvac 1.

In the balancing act of getting an additive package together, there is only so much you can keep in solution.

 

[Pablo]

Surprized no one mentioned that some/most of the diesel companies have in the past written some pretty strong letters against moly in Diesel oils and would not certify them - we can judge these now to be against MoS2....but I think this stigma stuck.

 

[Pablo]

"Note: Since oil formulations vary it is recommended that upon the incorporation of any additive the finished product be tested to confirm original test results. In some formulations, the presence of MOLYVAN L may contribute to copper corrosion which would be detrimental to some diesel engines. Therefore, its use in such lubricants is not recommended."

From: http://www.rtvanderbilt.com/petro_5.htm

 

[BOBISTHEOILGUY]

http://www.bobistheoilguy.com/images/cummins_corrosion_bench_test_res.htm

HERE IS THE VERSON FOR MOLY THAT HAS BEEN APPROVED FOR USE IN DESIELS.

 

[Pablo]

Thanks Bob!

My point was not to say there is anything wrong with Mo in diesel oils, my point was to point out why there is no Mo in some diesel oils and say there is some serious history here.

 

[DJStillman]

quote:

---

Originally posted by BOBISTHEOILGUY:
http://www.bobistheoilguy.com/images/cummins_corrosion_bench_test_res.htm

HERE IS THE VERSON FOR MOLY THAT HAS BEEN APPROVED FOR USE IN DESIELS.

---

Bob,

It is so very good to have you back with us!

D

 

[salesrep]

PABLO" My point was not to say there is anything wrong with Mo in diesel oils, my point was to point out why there is no Mo in some diesel oils and say there is some serious history here."

Exactly. History... Don't be comin up with moly bashing with history. Current Moly by any reputable Co. Kicks A*** and has proven beyond a shadow of a doubt to be a very effective additive.
Is it the be all to end all? Maybe not. But current formulations in Engine oil IS NOT A NEGATIVE. So stop bringing up history it does not matter any more.

Note:" Since oil formulations vary it is recommended that upon the incorporation of any additive the finished product be tested to confirm original test results. In some formulations, the presence of MOLYVAN L may contribute to copper corrosion which would be detrimental to some diesel engines. Therefore, its use in such lubricants is not recommended."

Futher more this reference is an additive vs. an oil formulation. Apples and Oranges.

[ December 19, 2004, 04:31 AM: Message edited by: salesrep ]

 

[Pablo]

Salesrep - please show me where I BASHED Moly.

Wow. The original poster asks a question. I answer it properly. Then I get attacked by Scheafer's. Chill out.

Why do you have to come across as such an arsehole?

All I ever said is that Mo is not some cure all magic elixir. It isn't. You even say that yourself.

 

[salesrep]

 

[Pablo]

 

[GregH]

Bob,
Glad to see you back in circulation. Hope all is better with you!
Merry Christmas
Greg H

 

[Strjock81]

New CI4+ Delo has a good dose of moly in it, eight?

 

[Michael Polutta]

eeeeeeeyup!

 

[Pablo]

Yes Delo has Mo and I'll be doing the blend thing with Amsoil 15w40.....!

 

[Bio-T]

Moly vs. No Moly


All major oil companies are using the organo moly. No copper corrosion problems. This point is always brought up when a non-moly oil and an oil containing moly are discussed. The Cummins engine comes from the factory with Valvoline in the engine, and walla, it contains moly, and walla, Cummins is the one who published the dated paper to not use Moly. Now we know they meant powered moly. (sorry MolaKule for my non chemical names).

My best oil analysis ever was on two oils containing moly, Red Line in a gasser and Schaeffers 15W40 semi-syn in my 01 PSD.

 

[Pablo]

Actually that cracks me up Vetteman! (about Valvoline!)

Again - I want to be clear - I was NOT bashing Mo or any one oil. I just wanted to honestly answer the caller's question. I believe some oils stay away from Moly for things like Cummins' report.

Is now the time to bring up the removal of Moly from Pennzoil 15w40? (ducking now

)