Mos2 dosing

Status
Not open for further replies.
Originally Posted By: ARCOgraphite
If MoS2 had real benefits in motor oil it would be used as an EP/AW in current approved oils.


Maybe, maybe not. There are a lot of reasons oil companies use an additive or not. Most are related to profit. Sorry if I seem cynical on this.

Originally Posted By: ARCOgraphite
I say again, its not used in ANY ILSAC certified motor oil. PERIOD.


You are simply mistaken. Liqui-Moly makes a variety of oils, including Leichtlauf Special AA 5w30, which is GF-5 Certified. There are a whole list of their motor oils, most of which contain MoS2, listed on ILSAC's site. Many are not popular in the US, but that's hardly disqualifying. Regardless, you should not conflate oil company marketing and certification decisions with the utility of a product. There are simply too many other variables in the mix.

Originally Posted By: ARCOgraphite
I ran it in the Honda (below) and I lost pressure and almost grenaded the engine.


I am sorry to hear that you lost oil pressure in your Honda, but why do you attribute this to the presence of MoS2? Exactly how did you lose oil pressure? What is the link to a particular additive?

Strangely enough, if you lost oil pressure because you lost your oil (leak, loose drain plug, stray bullet) MoS2 in your oil might have been your savior! That is a classic military use of this product.

We have used Liqui-moly in an RSX and the engine loved it - never ran better. Both Honda (including the Acura RSX) and Toyota use oil pressure to power their variable valve timing mechanism and MoS2 makes it work even better. About the only caveat on vehicles such as these is that using too heavy weight oil can mess up the mechanism. Too heavy oil does not actually result in a loss of oil pressure, but it will sure trip the oil idiot light. The mineral oil carrier in Liqui-moly additive is quite thin, so it should have no negative effect on this.
 
Originally Posted By: dave5358


I am sorry to hear that you lost oil pressure in your Honda, but why do you attribute this to the presence of MoS2? Exactly how did you lose oil pressure? What is the link to a particular additive?

Strangely enough, if you lost oil pressure because you lost your oil (leak, loose drain plug, stray bullet) MoS2 in your oil might have been your savior! That is a classic military use of this product.

We have used Liqui-moly in an RSX and the engine loved it - never ran better. Both Honda (including the Acura RSX) and Toyota use oil pressure to power their variable valve timing mechanism and MoS2 makes it work even better. About the only caveat on vehicles such as these is that using too heavy weight oil can mess up the mechanism. Too heavy oil does not actually result in a loss of oil pressure, but it will sure trip the oil idiot light. The mineral oil carrier in Liqui-moly additive is quite thin, so it should have no negative effect on this.

IIRC this isn't the first engine he's lost, unless I have him mixed up with someone else.
 
Originally Posted By: demarpaint
Originally Posted By: dave5358


I am sorry to hear that you lost oil pressure in your Honda, but why do you attribute this to the presence of MoS2? Exactly how did you lose oil pressure? What is the link to a particular additive?

Strangely enough, if you lost oil pressure because you lost your oil (leak, loose drain plug, stray bullet) MoS2 in your oil might have been your savior! That is a classic military use of this product.

We have used Liqui-moly in an RSX and the engine loved it - never ran better. Both Honda (including the Acura RSX) and Toyota use oil pressure to power their variable valve timing mechanism and MoS2 makes it work even better. About the only caveat on vehicles such as these is that using too heavy weight oil can mess up the mechanism. Too heavy oil does not actually result in a loss of oil pressure, but it will sure trip the oil idiot light. The mineral oil carrier in Liqui-moly additive is quite thin, so it should have no negative effect on this.

IIRC this isn't the first engine he's lost, unless I have him mixed up with someone else.


Losing an engine is no fun. But I'm curious as to why he attributes this to an oil additive and particularly to MoS2?
 
Originally Posted By: dave5358
Originally Posted By: demarpaint
Originally Posted By: dave5358


I am sorry to hear that you lost oil pressure in your Honda, but why do you attribute this to the presence of MoS2? Exactly how did you lose oil pressure? What is the link to a particular additive?

Strangely enough, if you lost oil pressure because you lost your oil (leak, loose drain plug, stray bullet) MoS2 in your oil might have been your savior! That is a classic military use of this product.

We have used Liqui-moly in an RSX and the engine loved it - never ran better. Both Honda (including the Acura RSX) and Toyota use oil pressure to power their variable valve timing mechanism and MoS2 makes it work even better. About the only caveat on vehicles such as these is that using too heavy weight oil can mess up the mechanism. Too heavy oil does not actually result in a loss of oil pressure, but it will sure trip the oil idiot light. The mineral oil carrier in Liqui-moly additive is quite thin, so it should have no negative effect on this.

IIRC this isn't the first engine he's lost, unless I have him mixed up with someone else.


Losing an engine is no fun. But I'm curious as to why he attributes this to an oil additive and particularly to MoS2?


I stand corrected it appears he just lost oil pressure with this engine. IIRC he has lost other engines, although I don't recall how or why.
 
Originally Posted By: demarpaint
I stand corrected it appears he just lost oil pressure with this engine. IIRC he has lost other engines, although I don't recall how or why.


Okay, but why did he suddenly lose oil pressure? That's hardly an everyday occurrence. And, why does he feel that it was somehow related to the use of MoS2?

I mentioned engines with variable valve timing, since they use the hydraulic force of oil pressure to adjust the valve timing. Such engines frequently measure oil pressure (for oil light purposes) at a point beyond the camshaft. In such an engine, it is possible to have perfectly adequate main gallery oil pressure but still trip the oil pressure light. I don't know if that was his situation, but I've seen it happen on late model Toyotas, and it should be a possibility on some later model Honda engines as well. MoS2 usage (or not) should have no affect on this situation. While this might be an unnerving experience, it would almost certainly not damage the engine.
 
Originally Posted By: dave5358

Okay, but why did he suddenly lose oil pressure? That's hardly an everyday occurrence. And, why does he feel that it was somehow related to the use of MoS2?



Great questions, maybe he'll weigh in and let us know.
 
One 300mL Whole Can of MoS2 provides ~175 ppm of Moly in a 5qt sump. I did the chemical dilution calculations based on the virgin analysis of MoS2.

Therefore 1 can = 175ppm, 1/2 Can = 88ppm

I think 1/2 can per oil change is sufficient after the initial "plate" of MoS2 with a full dose. However I doubt even a full dose each time is harmful.

So far I'm 1000 miles into using it (full can first dose) on my Subaru 2.5L boxer, and things are as smooth and quiet as I can imagine. So far I haven't notied any ill effects and I will be checking my fuel economy this weekend when I do a long trip.
 
Originally Posted By: Hollow
Originally Posted By: 95busa
This thread. Waste of electrons.


Then stop posting in it.

Train wrecks are amusing
 
Originally Posted By: dave5358
Losing an engine is no fun. But I'm curious as to why he attributes this to an oil additive and particularly to MoS2?

He "claimed" that the MoS2 plugged his oil filter which caused a loss of oil pressure. No hard evidence was provided. I told him that the claim of lost oil pressure due to a plugged oil filter was "nonsense". I stand by my statement. IF the oil filter media gets plugged, the bypass valve will open, resulting in NO loss of oil feed or oil pressure, and THAT is a FACT! He can believe what he wants to believe, but he IS mistaken.
 
Last edited:
I've been using mos2 in everything I own for years now. Never plugged a filter for me yet.
As far as the liqui-moly oils using mos2 I've only seen a 10w-40 grade infused with mos2.
Funny thing. I've got liqui-moly 0w-40 in my chargers sump right now. Oil temps immediately dropped from a consistent 213f to 200f-203f. I put cera-tec in with the oil this time.
I've also lots 7mpg highway since not adding mos2 to the oil.
Some engines see fuel consumption increases,some don't. My moms caliber didn't see any fuel economy benefit. Funny thing is my charger get better mileage than her caliber does.
If you're buying it for fuel consumption benefits you may or may not be pleased however it does more than that. My charger exhibited was less engine vibration after using it.
I think how much wear the engine already has factors in to how much mos2 can help.
I bought all 15 cans off the shelf yesterday. Added it to my buddy's 06 f150. It's got a 5.4 in it. I guess I'll soon see if he's pleased with the stuff since I've asked him to track mileage for his past 3 tanks and the next 3 tanks.
 
Originally Posted By: wag123
Originally Posted By: dave5358
Losing an engine is no fun. But I'm curious as to why he attributes this to an oil additive and particularly to MoS2?

He "claimed" that the MoS2 plugged his oil filter which caused a loss of oil pressure. No hard evidence was provided. I told him that the claim of lost oil pressure due to a plugged oil filter was "nonsense". I stand by my statement. IF the oil filter media gets plugged, the bypass valve will open, resulting in NO loss of oil feed or oil pressure, and THAT is a FACT! He can believe what he wants to believe, but he IS mistaken.


It would be nice if ARCOgraphite responded, and he may still do so.

Some years ago, I used 8-10 micron particle-size MoS2 and experienced no filter clogging. The filter didn't even seem to catch the stuff. Most oil filters start working on >15 micron sized particles. At 20 microns, they're filtering pretty well - maybe 90% efficiency. For 10 micron-sized particles, hardly anything is trapped. For moly in suspension, the particle size is .2-.3 microns... the filter might as well not be there.

And, as you point out, oil filters come with bypass valves.

ARCOgrahite's Honda i-VTEC (variable valve timing) engine can report low oil pressure for other reasons as well - particularly if the oil in use is too heavy (wrong grade, sludge). Pressure is measured beyond the camshaft and beyond the VTEC actuation mechanism. Too-heavy oil or oil with sludge interferes with the VTEC metering. There's also a pressure relief valve in this mechanism which can also confuse things. Here is a rather nice discussion of this engineering and the increased importance of regular oil changes with the correct weight oil... from the mouth of 'Gonzo' Weaver.. Toyota VVT engines suffer similar maladies.

Still, a low oil pressure light is disturbing.
 
ARCOgrahite's issue with some oils & oil additives (MoS2, MMO etc) stretches back to at least 2009 folks. Do a search for yourselves, but for one reason or another he has had several engine issues, or noises from different engine manufactures some to which just oil or oil additives he has attributed the source. No one else on here has been able to find any supporting evidence as to why his issues exist. It's the internet and we are all allowed to post our opinions.

Back to the thread....

The truth of the matter is on the topic of MoS2, it flows through the filter media freely. It can't & won't cause oil pressure issues. It works as advertised promoting engine smoothness and quietness. It may/may not contribute to increased fuel economy depending on your specific engine condition, it may/may not solve all your engine woes (stuck rings, blow-by etc), but it does work as advertised.
 
Last edited:
Originally Posted By: Smokescreen
The truth of the matter is on the topic of MoS2, it flows through the filter media freely. It can't & won't cause oil pressure issues. It works as advertised promoting engine smoothness and quietness. It may/may not contribute to increased fuel economy depending on your specific engine condition, it may/may not solve all your engine woes (stuck rings, blow-by etc), but it does work as advertised.


+1
 
Originally Posted By: dave5358
Originally Posted By: Smokescreen
The truth of the matter is on the topic of MoS2, it flows through the filter media freely. It can't & won't cause oil pressure issues. It works as advertised promoting engine smoothness and quietness. It may/may not contribute to increased fuel economy depending on your specific engine condition, it may/may not solve all your engine woes (stuck rings, blow-by etc), but it does work as advertised.


+1


+2 Well said.
 
I think from my sound level testing that, in the absence of any mechanical changes, the reduction in noise almost certainly signifies some reduction in friction. The real question is, does the amount of friction reduction cause a statistically significant in fuel economy.

In the case of my Miata, fuel economy has increased by 5-8% in steady state freeway operation, to about 35 MPG at 70 MPH. So, let's see if I can do some rough math correctly.

One gallon of gasoline contains approximately 120000 kilojoules of energy. I'm using two gallons per hour, 240000 kj total. A 5% decrease means saving 12000 kj over 7200 seconds, which is 1667 watts or 2.36 horsepower.

That seems reasonable to me that the Miata's 1.8 liter engine, spinning at 3500 RPMs, requires 2.36 hp less to overcome inherent friction minus whatever benefit I got from better cylinder/ring sealing.
 
...by that math, you can mod an engine by moving to MoS2 providing the same gains as most aftermarket mufflers or intakes...LOL

I noticed no change in fuel economy.
 
Last edited:
Originally Posted By: Smokescreen
...by that math, you can mod an engine by moving to MoS2 providing the same gains as most aftermarket mufflers or intakes...LOL

I noticed no change in fuel economy.


I'm not sure I understand. Is there something wrong with my math?

Yes, you can put on an aftermarket muffler or intake, and those may allow an engine to produce a maximum of 2 or 3 more horsepower, but it appears the MoS2 allowed my Miata engine to produce a sub-maximal power output while reducing internal frictional losses on the order of 2-3 horsepower. Those are entirely different things.

So I guess I'm confused by what you mean.
 
Status
Not open for further replies.

Similar threads

Owen Lucas
Can you use Liqui Moly Motor Oil Saver with Liqui Moly Viscoplus?
Replies
8
Views
7K
CarNut84GTI
P
Revisiting the idea of low rolling resistance tires on my cars
Replies
8
Views
927
PandaBear
C
5W30 HM ipo Euro 5W40 - want a high mileage oil but no 5W40
2
Replies
39
Views
3K
RobbS
wwillson
Pennzoil - Low-speed pre-ignition (LSPI) Q&A - Answers
Replies
6
Views
5K
garageman402
A
Help with Engine knock - rod bearing/hydaulic lifter/fuel injector, which one?
2
Replies
32
Views
5K
50yr Street Mech
Back
Top Bottom