Possible Moly Excess Boosted my Compression?

[Kurtatron]

I switched to Redline 5w30 about 2 months ago. The virgin oil contains about 950ppm moly. Well, my car's cold start performance has changed somewhat. It starts almost immediately. Before, the car would crank some before firing. It has caught me off guard before. I will turn the key and the engine growls to life so soon. I'm wondering if the moly could have caused the car to obtain better ring sealing. Maybe this helps it start sooner? Am I just delusional? The car is a 92' miata with 120k miles.

 

[simple_gifts]

Quote:

Am I just delusional?

 

[xxch4osxx]

I don't know if it would have any effect on the rings. I was always under the impression moly was for extreme pressure lubrication. Im sure other more informed members will chime in on this.

 

[Dieseldoctor]

I read a report somewhere where moly seals rings maybe even on there website? by filling in the scratches in the ring land area where extreme pressure/ heat exist... just from what i remember reading somewhere..

 

[Bigsyke]

Funny thing, but I was going to post something along the same lines as the OP. I think its very possible. I had a similar experience after I added a bottle of MoS2 and my vacuum increased.

 

[JAG]

I too noticed that Red Line 5w30 makes my 1.8T GTI start more quickly than other oils I've used. I don't think it's a compression thing...I think it causes a lower frictional resistance to turning over so it spins faster while the starter is working.

 

[Nick R]

I do notice this with Maxlife in my car. It starts almost instantly most of the time, especially cold. Hadn't thought about it in terms of moly. I hope that Synpower can acheive this level of starting ability.

 

[Kurtatron]

Originally Posted By: JAG
I too noticed that Red Line 5w30 makes my 1.8T GTI start more quickly than other oils I've used. I don't think it's a compression thing...I think it causes a lower frictional resistance to turning over so it spins faster while the starter is working.


I'm glad I'm not the only who notices this. Your theory makes more sense. The friction loss not only occurs in the cylinder, but the bearings, rods, cams, and every other moving metal part. Maybe all this together allows the starter to turn faster and get the car started faster. I just wonder about the instant starts though. Does the starter have enough time to accelerate to top speed in a quarter of a second?

 

[mechtech2]

Less friction is why is started to use Lubro Molly [an aftermarket moly additive].
But it may have additional benefits for sealing in the ring area and valve seats.

 

[bluesubie]

Maybe the esters help as well.

RL 5w30 started more easily than anything that I've used (GC, SSO, DEO, & M1 0W-40).

-Dennis

 

[Bigsyke]

However the more I read, MoS2 additive seems harmful, so ive stopped using it. Also didnt an XOM engineer see corrosion and no benifits around 300ppm of MoS2?

 

[mechtech2]

Bigskye - Read the ingredients of oils.
They almost all use moly.
It is a highly valued additive.
Specialty oils use even more.

 

[Jax_RX8]

Originally Posted By: mechtech2
Bigskye - Read the ingredients of oils.
They almost all use moly.
It is a highly valued additive.
Specialty oils use even more.


Yes, but they use soluble moly, not MOS2

 

[OilBlazer93]

Originally Posted By: Jax_RX8
Originally Posted By: mechtech2
Bigskye - Read the ingredients of oils.
They almost all use moly.
It is a highly valued additive.
Specialty oils use even more.


Yes, but they use soluble moly, not MOS2


Im Intrigued. So.. that can of MOS2 at Napa "Doesnt Do Anything?

And Bigsyke is right.. "Too Much Moly" can kill the other Additives. but i think around 2000ppm, whereas Oils have like 900ppm or so, or the kind i use, seems to be "Lots and Lots of Moly" without going Nuclear.

I may just give a can of this stuff a shot at next OCI. My ZDDP Levels are in check.

 

[shpankey]

I've definitely noticed the quicker starting on my car too with Redline oil. Though I'm running their 10w40 (also high in moly).

I've seen it mentioned also that over like 250ppm of moly actually became more harmful that helpful. Dpm't ask me to link it b/c I forgot where I seen it. I think on BitoG though.

 

[Kurtatron]

Unless someone can provide evidence that some oils use different Moly derivatives, I believe it's the suspension of it that's been developed. This is taken from BITOG's Moly basics:

"Engineers and scientists have tried for years to use Moly in motor oils but they had been unsuccessful because they could not find a way to keep Moly in suspension."

"Engineers have overcome these obstacles. They have developed a process that keeps Moly in suspension and isn't filtered out."

It's like the oil and water example. The fluids are immiscible, but if you add an intermediate solvent into these two, you can make them mix. I believe engineers designed a chemical to support Moly. I'm not sure there's a such thing as soluble and insoluble MoS2.

The excess moly harm does intrigue me however. I want a link though. I inclined to think Redline has a greater understanding of Moly than non-related professionals

 

[dailydriver]

Originally Posted By: bluesubie
Maybe the esters help as well.

RL 5w30 started more easily than anything that I've used (GC, SSO, DEO, & M1 0W-40).

-Dennis


Possibly (as far as the group 5 esters helping goes), but the RL 5w30 is also a lower cSt at both 40* & 100* than the GC (I don't know about the others).

Another reason I mix the 5w30 & 10W-40 (LSx engines "like" an ~ 11.5 to 12.6 or so cSt @ 100*).

 

[JAG]

https://bobistheoilguy.com/forums/threads/nice-modtc-mechanism-article.18816/

Link

https://bobistheoilguy.com/forums/threads/nice-modtc-mechanism-article.18816/

 

[Ben99GT]

I've never noticed quicker starting with RL 5w30 in my car, I just notice the engine's a lot more silent and consistent sounding on cold starts than it is with other oils. Dramatically so, in fact.

 

[Kurtatron]

Thank you for the links. Now I have an idea that there are in fact different kinds of moly compounds used in oils. Great article there too!