Originally Posted by Porschetech3

Well I don't mean to be argumentative, and I'm not saying the new oil is better, but I'm convinced it has more high pressure wear resistance, and that is what I'm more concerned with.This guy is an engineer and has tested over 200 different oils. I can give you a link to the blog but is is way more information than most people want. Here is just a little insert from the link.


This is the only side by side tests I have ever seen on extreme pressure oil film. Out of over 200 oils tested,
the 0w40 mobil 1 "FS" ranked #3 and the old version 0w40 mobil 1 ranked #106




3. 0W40 Mobil 1 “FS” European Car Formula, ACEA A3/B3, A3/B4, API SN, synthetic = 127,221 psi
This new oil replaces the older version called, 0W40 Mobil 1, European Formula, API SN, synthetic. See below for
the older version’s ranking position.
zinc = TBD
phos = TBD
moly = TBD
This new “FS” version was tested in Summer 2016. This oil produced the highest psi value ever seen in my testing,
from any motor oil just as it comes right out of the bottle, with no aftermarket additives. Very impressive.

I also went on to test this oil at the much higher temperature of 275*F. At that elevated temperature, any hotter
and thinner oil is expected to experience a drop in Wear Protection Capability. This oil did have a 16% drop in
capability. But, even at that elevated temperature, it produced an impressive 106,876 psi, which still kept this
much hotter and thinner oil in the INCREDIBLE Wear Protection Category.

I also tested this oil to find out its onset of thermal breakdown, which was 280F.



106. 0W40 Mobil 1, European Formula, API SN, made in the U.S., synthetic = 82,644 psi
This is an earlier version that has been replaced by 0W40 Mobil 1 “FS” European Car Formula. See above for the newer
version’s ranking position.
zinc = TBD
phos = TBD
moly = TBD

Originally Posted by powdrhound

Hey Kevin,
As you know I've been running M1 5W50 for about 4 years now. I'm thinking about trying the M1 racing 0W50. Do you have any experience with it? At $18/quart it's pricey but supposed to have tons of the good stuff but no detergents. I would run this during track season when I'm doing oil changes about every 500-800 track miles, or about every two month so the lack of detergents should not be an issue. Probably not good for cats but I'd run catless during track season. Off season I would run the 5w50. What say you? Thanks....


[url=https://flic.kr/p/S4f38c]

Originally Posted by DaveCarrera4

So... where are you all finding the best price on M1 5W 50?

Originally Posted by 09RedGTS

I'm an engineer too. That engineer might be paid to sell that. I don't see any results for the 4-ball wear test. And oxidation tests are important too, but missing. But I am suspicious of the new oil if the viscosity and flash point are lower, and the ash test is higher. These test results are going the wrong way. I'm not convinced. Show me the 4 ball wear and oxidation tests. maybe the cost of the new one is lower and that's why they are pushing it....

​​​​​​If y'all are telling me they want more than 3 times as much money for it, then we all have va pretty good idea why they are pushing it. If it's still $25.47 for 5 qts at Wal-Mart, then maybe we should continue this discussion.

Originally Posted by DaveCarrera4

So... where are you all finding the best price on M1 5W 50?

Originally Posted by Porschetech3

The engineer claims he is not paid or associated with any oil company, as his test has over 200 different oils and the brands different oils range all through the ratings.While he admits oxidations and other factors are important and are not included in his extreme pressure wear test, and also viscosity is very helpfull in maintaining higher oil pressure to ensure proper hydrodynamic function of main and rod bearings,it is not a factor in border and mixed bearing functiion or sliding function of all other high pressure wear items. Hence the use of thinner oils (0w20) in NASCAR and other forms of high performance. This is the result of the oil film of the additive package of each particular blend.

I have not seen any side by side test using the four ball test on these or any other interesting oils, if you can post a link I would love to see the test on the "old" vs "new" 0w40 Mobil 1 and also the "new" FSX2 5w50 Mobil 1 vs the "old 5w50 Mobil 1. I am always will to learn and change my mind if the data supports it.

Originally Posted by justabout

So basically, the rings and camshafts might not be protected better since these experience boundary lubrication (camshaft load to high and rings slow down and reverse direction so hydrodynamic lubrication is less). Higher viscosity would be better for these cases.

Originally Posted by DaveCarrera4

So... where are you all finding the best price on M1 5W 50?

Originally Posted by jimq

Got the oil today and it says FS.