Moly vs non-Moly oils

Pennzoil motor oil
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I take Moly over others (Titanium?, etc.) every day and twice on Sundays but don't go out of my way to find oils with high amounts of moly.

However, I have one car that I really like and it's noisy in nature. that baby gets good oil with lots of moly (not the additive kind). it calms her down! Oil price is not much of an issue with this car. You know other cars can get oils with no/low moly, on sale oils, etc. but you gotta treat your favorite car the right way like its your first girl friend ... wait, I don't think I treated my first girl friend as best as I could have but that's another story. Youthful indiscretion. lol
 
OilUzer said:
I take Moly over others (Titanium?, etc.) every day and twice on Sundays but don't go out of my way to find oils with high amounts of moly.

However, I have one car that I really like and it's noisy in nature. that baby gets good oil with lots of moly (not the additive kind). it calms her down! Oil price is not much of an issue with this car. You know other cars can get oils with no/low moly, on sale oils, etc. but you gotta treat your favorite car the right way like its your first girl friend ... wait, I don't think I treated my first girl friend as best as I could have but that's another story. Youthful indiscretion. lol
Click to expand...


Well, uh,,,,,,,,, I guess so.
 
adams355 said:
You don't want to be using moly if you have any DLC coated parts in your engine. A lot of aftermarket engine parts are DLC coated not sure if any of the big names are using them from the factory. Moly DTC causes increased wear to DLC coated parts.
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What is DLC? How do I know if my engine has it? What parts would be coated with it?
 
from wiki:

Tribology​

DLC coatings are often used to prevent wear due to their excellent tribological properties. DLC is very resistant to abrasive and adhesive wear making it suitable for use in applications that experience extreme contact pressure, both in rolling and sliding contact. DLC is often used to prevent wear on razor blades and metal cutting tools, including lathe inserts and milling cutters. DLC is used in bearings, cams, cam followers, and shafts in the automobile industry. The coatings reduce wear during the 'break-in' period, where drive train components may be starved for lubrication.
Click to expand...
 
I don't doubt that, but as I understood or remember about MoDTC is that it functions mostly shortly after the oil change. More will probably last longer than less and one engine or user isn't the next either. Helps with the fuel economy testing most likely.
 
adams355 said:
https://www.sciencedirect.com/science/article/pii/S004316481300272X
https://www.researchgate.net/public...ic_wear_of_DLC_film_in_engine_oil_with_Mo-DTC

You can offset the wear with higher amounts of ZDDP
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This article is misleading.

Infineum studied trinuclear moly DTC on a DLC coating more than eleven years ago. They found that ZDDP alone or moly alone both show high wear. However, ZDDP and moly together act synergistically to reduce wear. Since in a real-life oil, you will always have ZDDP, moly will reduce wear on DLC coatings.

Infineum trinuclear moly presentation by Ben Elvidge and Jai Bansal
Molybdenum additive technology for engine oil applications
Presented at the Japan Tribology on the 6th–11th September 2009 in Kyoto, Japan

Moly is one of the many available antiwear (AW), extreme pressure (EP), and friction modifier (FM) additives, some metallic, others organic. It needs to be used synergically with other such additives as well as the rest of the detergent–dispersant–inhibitor (DDI) package and the base oil to be effective and not detrimental to the performance of the engine oil.
 
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There is a heap of research on the net about it. The wear is significantly reduced with ZDDP. I just thought it was interesting. I use oil with 450 Moly DTC but also Zinc 1500 and phosphorous 1500. I don't have any DLC coated parts though and I don't think I would have much concern if I did. But, interestingly we have seen a decrease in moly with oil manufacturer's maybe this is inline with the amounts of ZDDP used.

https://link.springer.com/article/10.1007/s11249-016-0737-0
 
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adams355 said:
There is a heap of research on the net about it. The wear is significantly reduced with ZDDP. I just though it was interesting. I use oil with 450 Moly DTC but also Zinc 1500 and phosphorous 1500. I don't have any DLC coated parts though and I don't think I would have much concern if I did. But, interestingly we have seen a decrease in moly with oil manufacturer's maybe this is inline with the amounts of ZDDP used.

https://link.springer.com/article/10.1007/s11249-016-0737-0
Click to expand...

Keep in mind that there are different forms of moly. Shell and Mobil both use Infineum's tri-nuclear moly, which requires a lower treatment rate to achieve the same effect.
 
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