Moly in oil - if not important, why article on it?
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Originally Posted By: FrankN4
There are also two different moly adds. I think the more expensive one is something like MOLY DTC which is completely soluble, but corrosive.
Is this really true? I always thought it was the sulphur that is corrosive to yellow metals, such as in Sulphur-Phosphorus EP additives and MoS2. MoS2 is a sulphur containing compound consisting of moly and sulphur, perhaps this one varient of moly has given the entire element a bad name?
There are also two different moly adds. I think the more expensive one is something like MOLY DTC which is completely soluble, but corrosive.
Is this really true? I always thought it was the sulphur that is corrosive to yellow metals, such as in Sulphur-Phosphorus EP additives and MoS2. MoS2 is a sulphur containing compound consisting of moly and sulphur, perhaps this one varient of moly has given the entire element a bad name?
Max, MoDTC has sulfur in it...the "diTHIO" indicates that. It can be corrosive but isn't when used properly.
The molyslip product does say they add corrosion inhibitors to their formulation, probably because they're needed
"MolySlip is a colloidal suspension of molybdenum disulfide (MoS2) in a high grade, multi-viscosity engine oil that contains anti-foam agents and corrosion inhibitors"
Originally Posted By: mailman74
clyde 65 / merkava4 is that you.
troll
"MolySlip is a colloidal suspension of molybdenum disulfide (MoS2) in a high grade, multi-viscosity engine oil that contains anti-foam agents and corrosion inhibitors"
Originally Posted By: mailman74
clyde 65 / merkava4 is that you.
Originally Posted By: Bryanccfshr
Moly isn't good in diesel applications.
How come delo 400 has Moly thio in it?
Moly isn't good in diesel applications.
How come delo 400 has Moly thio in it?
Originally Posted By: Steve S
Originally Posted By: Bryanccfshr
Moly isn't good in diesel applications.
How come delo 400 has Moly thio in it?
Whatever the friction modifier is used, I believe you have to be careful as a formulator to get it right. A couple of years ago I posted a link to a study to this site that compared the traction coefficient in HDEO's and roller cam wear in high speed medium duty diesel engines, reduce the traction coefficient too much and the roller will start to slide at certain points of the revolution, thus creating increased wear and flat spots on the cams or cam followers necessitating early replacement of these components.
Originally Posted By: Bryanccfshr
Moly isn't good in diesel applications.
How come delo 400 has Moly thio in it?
Whatever the friction modifier is used, I believe you have to be careful as a formulator to get it right. A couple of years ago I posted a link to a study to this site that compared the traction coefficient in HDEO's and roller cam wear in high speed medium duty diesel engines, reduce the traction coefficient too much and the roller will start to slide at certain points of the revolution, thus creating increased wear and flat spots on the cams or cam followers necessitating early replacement of these components.
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Originally Posted By: Steve S
Originally Posted By: Bryanccfshr
Moly isn't good in diesel applications.
How come delo 400 has Moly thio in it?
Havoline have told me that they don't use Moly as an anti wear agent, they use it primarily as anti oxidants. Thats why they dont use as much as what other companies may.
Originally Posted By: Bryanccfshr
Moly isn't good in diesel applications.
How come delo 400 has Moly thio in it?
Havoline have told me that they don't use Moly as an anti wear agent, they use it primarily as anti oxidants. Thats why they dont use as much as what other companies may.
Originally Posted By: JAG
Max, MoDTC has sulfur in it...the "diTHIO" indicates that. It can be corrosive but isn't when used properly.
ah yes of course, good call. I guess I'm wondering if moly can be used as an AW additive without compouding it with sulphur? Is there a sticky or article that explains the role, pros and cons of additives? (like B, Ca etc..)
Max, MoDTC has sulfur in it...the "diTHIO" indicates that. It can be corrosive but isn't when used properly.
Originally Posted By: Max_Wander
ah yes of course, good call. I guess I'm wondering if moly can be used as an AW additive without compouding it with sulphur? Is there a sticky or article that explains the role, pros and cons of additives? (like B, Ca etc..)
Yes there are sulfur-free molybdenum AW additives. You should find plenty in this link to learn about additives: http://www.rtvanderbilt.com/petro_2.htm#50490
But I doubt you'll see much there on Boron (can be many things) or Calcium (detergent).
ah yes of course, good call. I guess I'm wondering if moly can be used as an AW additive without compouding it with sulphur? Is there a sticky or article that explains the role, pros and cons of additives? (like B, Ca etc..)
Yes there are sulfur-free molybdenum AW additives. You should find plenty in this link to learn about additives: http://www.rtvanderbilt.com/petro_2.htm#50490
But I doubt you'll see much there on Boron (can be many things) or Calcium (detergent).
JAG thanks for that link. I see an article about borate esters!
You're welcome. I'm glad you found the borate ester article! Check out the GF-5 article if you haven't already.
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