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#2463087 - 12/15/11 05:06 AM MOS2 Additive
jayschrodter Offline


Registered: 12/14/11
Posts: 3
Loc: Australia
Hi there guys,

Just thought I would let you know my experience with this oil additive. I put 250ml in my Audi Quattro and felt a difference. The most noticeable effect is the reduction in engine braking, it seems to coast far longer (which I suppose is how the would formulate their claim for friction reduction?). Power has increased slightly maybe by 2-3%. Also requires less throttle input for climbing hills and cruising about. Put approx 20ml in with the central hydraulik fluid (steering/brake boost) and it has stopped the majority of the pump noise, and the pump no longer groans..

I didn't service it or change any variables, just curious if other people have had similar results?

The brand I used was Liqui Moly.

BTW - Do these additives reduce compression?


Edited by jayschrodter (12/15/11 05:08 AM)

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#2463179 - 12/15/11 08:40 AM Re: MOS2 Additive [Re: jayschrodter]
Clevy Offline


Registered: 11/11/10
Posts: 9783
Loc: Saskatoon canada
I buy that stuff by the case. Every gas powered piece of equipment I own plus my Harley ,mustang and truck get it too. In an industry filled with snake oil tjat stuff isn't.
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#2463216 - 12/15/11 09:26 AM Re: MOS2 Additive [Re: jayschrodter]
nicholas Online   content


Registered: 08/20/03
Posts: 721
Loc: ottawa
I have used - molyslip with very positive results -
use in the snow-blower was the most noticeable
MOS2=good stuff

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#2463246 - 12/15/11 10:11 AM Re: MOS2 Additive [Re: jayschrodter]
ARCOgraphite Online   content


Registered: 05/17/09
Posts: 11376
Loc: N.H, U.S.A.
The mos2 shouldnt affect engine braking unless its killing your ring seal. Moly is nice in an engine but mos2 will kill tBN faster due to acids formation. Just dont overdose, I would 50% underdose.


Edited by ARCOgraphite (12/15/11 10:12 AM)
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#2463264 - 12/15/11 10:43 AM Re: MOS2 Additive [Re: jayschrodter]
JHZR2 Offline



Registered: 12/14/02
Posts: 40527
Loc: New Jersey
See my threads about MoS2. You cant tell 2-3% power. All sorts of other variables, including temperature could have effected the results of what you claim.

I will agree that the throttle can be used slightly lighter, but in practice, I have not seen any MPG improvements over pre-MoS2 use (I manually log each tank).

It is good stuff, will see the long term effects next UOA.

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#2463422 - 12/15/11 01:25 PM Re: MOS2 Additive [Re: jayschrodter]
mechtech2 Offline


Registered: 09/05/06
Posts: 19479
Loc: Chicago Area
I have had Lubro Moly in so long that my comparisons are numbed.

But initially, the idle was smoother and there was more perceived pep.

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#2464091 - 12/15/11 11:53 PM Re: MOS2 Additive [Re: ARCOgraphite]
jayschrodter Offline


Registered: 12/14/11
Posts: 3
Loc: Australia
Thanks for the input guys.

Could be reducing ring seal, bottom end to mid-range seems the same, definitely a bit more from 4K - 7.5K rpm.

@ JHZ2, I can definitely see what your saying this was just my opinion from my experience that's all. I've given feedback on driving 2 stroke racing engines for the past 8 yrs, so to me I feel like I can notice any characteristic differences.

Ill have to compression check the engine to see if their is any change from last time it was checked.

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#2464115 - 12/16/11 12:55 AM Re: MOS2 Additive [Re: jayschrodter]
ltslimjim Offline


Registered: 08/06/10
Posts: 5640
Loc: WatUpDoc
I have an idea going forward with my current OCI. I plan to add a correct MoS2 dosage after the initial 1,000 miles into this OCI, with the idea of it being in there after the cleansing package does most of it's work. Take it up to 7,500 and sample.
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#2471002 - 12/23/11 10:14 AM Re: MOS2 Additive [Re: jayschrodter]
MichaelTiger Offline


Registered: 12/23/11
Posts: 1
Loc: Belgium
Solid lubricants in stable dispersion proved to work well in engines and transmissions. Look for high concentration, good stability and particle size <1 micron. Avoid PTFE, but graphite and Boron Nitride give great results as well.

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#2484834 - 01/06/12 03:20 PM Re: MOS2 Additive [Re: jayschrodter]
ltslimjim Offline


Registered: 08/06/10
Posts: 5640
Loc: WatUpDoc
I've seen a price increase of almost 100% for MoS2 at local Napa stores, FWIW. Still a decent buy at $7.49 retail locally. If it were to go up any higher, I'd probably stop using it...
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#2488828 - 01/10/12 09:06 AM Re: MOS2 Additive [Re: jayschrodter]
45ACP Offline


Registered: 04/03/11
Posts: 1271
Loc: Dallas Texas
I think it costs ~4.69 a can at NAPA? In any case, it is a good additive. Even in oils that have Moly already.. something about how the Moly in it is different, somehow. The effect IS noticeable! It "seals" the engine and moving parts up, in a good way. And although putting in the whole can (i put it in on a HOT engine, for maximum adhesion) makes a difference, putting in half a can then the other half later (if you can hold back your will to do so) will have virtually, if slightly less, the same effect.

I have heard somebody say they put in 2 cans once but i would not recommend doing that. And the change in oil color to "olive" is normal.

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#2488848 - 01/10/12 09:28 AM Re: MOS2 Additive [Re: jayschrodter]
Vikas Offline


Registered: 07/22/05
Posts: 11108
Loc: NorthEast
Is it advisable to put Kreen in the oil which was MOS2'd before? Won't they "fight" each other??

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#2488860 - 01/10/12 09:41 AM Re: MOS2 Additive [Re: Vikas]
45ACP Offline


Registered: 04/03/11
Posts: 1271
Loc: Dallas Texas
Originally Posted By: Vikas
Is it advisable to put Kreen in the oil which was MOS2'd before? Won't they "fight" each other??


"Kind of." Same when asked if Mos2 can be put in a sludged engine.

Some know better than I but the question was asked if MMO could be used the same time as Mos2. My answer would be "no" but others came in and said that they do different things, and could actually be used at the same time.

And while that sounds good at firs,t if it came down to it, .. i wouldnt do it, as it seems like "too much going on" after a good hard think. Kreen i would imagine would be the same.

Kreen it BEFORE Mos2 IMHO. As i said, i dont know "as much" as someone else but i have kept tabs on this, reading.

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#2488863 - 01/10/12 09:47 AM Re: MOS2 Additive [Re: jayschrodter]
Boss302fan Offline


Registered: 11/07/09
Posts: 2361
Loc: Oconomowoc Wi
There are cleaners and moly in most oils. What's the difference? I really do not think it makes a difference if you use MMO or Moly at the same time...
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#2488881 - 01/10/12 10:16 AM Re: MOS2 Additive [Re: Boss302fan]
45ACP Offline


Registered: 04/03/11
Posts: 1271
Loc: Dallas Texas
Originally Posted By: Boss302fan
There are cleaners and moly in most oils. What's the difference? I really do not think it makes a difference if you use MMO or Moly at the same time...


Yes but

1. They are proportioned to each other and

2. Motor oil is not known for its high moly content OR cleaning ability except predominantly in the case of PYB, PU, High POE M1 or Redline (both) and

3. The Moly goes "into" suspension and "out of" suspension. Does that happen in normal motor oil as well?

Just some thoughts smile

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