Lubri Moly Mos2 in a new Subaru Outback

[ARCOgraphite]

No ILSAC oil has micro powder moly emulsion in it. Munifacturers and OIl formulators are searching for every last MPG. If it worked and didn't do damage (or FAIL a sequence) why would it not be in at least a FEW formulations?

I see only fanboy logic here and no greek logic.

But if it puts wind in your sails, by gump Go for it!

I got bamboozled by the fanboys me wee Honda engine went nighty-night.

- Ken
NIASE master, Profession Mechanical Engineer(RET)

 

[Olas]

When friction has to be overcome by torque, anything to reduce that friction is only of benefit.

 

[oil_film_movies]

Originally Posted By: MolaKule
For Run-In, you want is an oil that has high ZDDP AW. You don't want an oil with a lot of friction reducers. Moly is not need for Run-In.


A slight overdose of moly becomes AW. I remembered a paper a few years ago that showed the moly particles filling asperities (fresh machining marks), as many think is exactly helpful in breakin.

Originally Posted By: Jay
There are two ways an engine breaks-in. One is where the asperities collide and instantaneously weld and tear away. That, obviously, leaves more (but smaller) asperities and it generates a wear particle that can cause more wear.

The other way is by plastic deformation where the asperities are mushed down rather than torn away. Plastic deformation leaves no jagged edges and generates no wear particle. Moly is a highly polar AW/AF additive that greatly aids break in by plastic deformation.

 

[Surestick]

Originally Posted By: ARCOgraphite
No ILSAC oil has micro powder moly emulsion in it. Munifacturers and OIl formulators are searching for every last MPG. If it worked and didn't do damage (or FAIL a sequence) why would it not be in at least a FEW formulations?

I see only fanboy logic here and no greek logic.

But if it puts wind in your sails, by gump Go for it!

I got bamboozled by the fanboys me wee Honda engine went nighty-night.

- Ken
NIASE master, Profession Mechanical Engineer(RET)


Motor oil needs to work for many different users, from the vehicle used every other weekend during the summer that sits all winter (where MOS2 will settle out) to a daily driver (where it won't).

There are a lot of users here who don't seem to have had any issues using MOS2 additives. Not all report any improvements in fuel mileage but there are very few who report any negative effects. It is possible your engine failure nothing to do with the moly you added, it was just bad timing.


Correlation vs. causality

Spurious correlations

 

[ARCOgraphite]

I cant argue that point, I agree.

I am semi-retired and working in manufacturing Quality Assurance and I am familiar with the above concepts.

I even had attended a week-long seminar at the Cape featuring Edwards Demming the "father of Quality Control" way back in the early 80's - if Bonnie Small was the mother

I pretty much grew up in Bell Laboratories.