Moly bad thing?

[V6 Diesel]

Found the following on a site called lubesolutions.com. Anyone heard of the claims they are making?

quote:

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Check out the OEM bulletin from Cummins. It is the Cummins Engine Oil Recommendations, Bulletin No. 3810340-02 dated May 1996. Its probably best if you stopped by a Cummins Dealer and purchased this bulletin- about $2 or $3.
On page 7 it has a section on FRICTION MODIFIERS states:
"There is firm evidence that certain friction modifiers, molybdenum dithiophosphate for example, can in certain formulations result in cam follower pin failure at relatively low mileage"........

From years working with engine test programs to approve engine oil formulations for API licensing, we can tell you that NO engine oil containing Molybdenum additives has been certified by the full range of engine tests necessary to gain API approval.

Molybdenum compounds in motor oils can degrade and cause bearing corrosion and is particularly aggressive towards copper. In almost all cases, any engine oil formula having "moly" will also contain a Copper Deactivator which will protect bearings from the moly compounds. The only problem, the copper deactivator decomposes at relatively low temperatures and looses it's potency after a few thousand miles

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[Ken2]

Old news. What you quoted might be true about molybdenum dithiophosphate, but Schaeffer, Pennzoil, Mobil, Castrol, and others are using molybdenum trialkyldithiocarbamate or a related compound...different stuff.

Check the approvals for yourself:
--quote--
Supreme 7000 SAE 15W-40 meets and exceeds the following manufacturers’ specifications and requirements: Military Specifications MIL-PRE-2104G and A-A-52306A, API Service Classification CI-4/CH-4/SL, Global Specification DHD-1, JASO DH-1, Mack EO-N and EO-N Plus, Allison C-4, Caterpillar, Caterpillar TO-2, Cummins CES 20078, CES 20076, CES 20071; Detroit Diesel, Detroit Diesel/MTU Types Categories 1 and 2, International Harvester, Navistar, John Deere, JI Case, Komatsu Dresser, ACEA E5-99, E3-96, B3-98, B4-98 A3-98; Duetz, Damiler Chrysler MB228.3, Damiler Chrysler MB228.5, MTU MTL 5044 Type 2; MAN 271,Renault, Scania, Volvo VDS-2 and VDS-3, and Volkswagen VW 502.00 and 505.00.

Cummins Bench Corrosion Test
Copper increase, ppm, 5
Lead increase, ppm, 8
Tin increase, ppm, Copper Strip Corrosion ASTM D-130, 1a
--end quote--

http://www.schaefferoil.com/data/700.htm


Ken

 

[MolaKule]

Try this thread or do a search on "moly dithiophosphate"

http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=1;t=000921