mffarrell

Gotcha!

911mhawk

The easiest way I had it explained to me was that 50w has better shear resistance in hot conditions.
If you drive hard regularly it gets hot enough to break down 40w no matter what exterior temperature is.

Macster

Probably doesn't get that cold where you are but be aware 5w-50 is not suitable to use when ambient temperature drops below -25C. In this case Porsche calls for 0w-40.

Kevin

At a very minimum, I would run 4 quarts 0W40 and 5 quarts (use what you need) 0W50.. Brian for where you live>>this is my recommendation.

From the specs that Macster has posted, the new formula is thiner. It is actually a tad "less" stoubt >>the HTHS is lower, one point higher VI vs the older formula. We will have see a Blackstone VOA or UOA. Folks ALL of the oil manufactures are having to make there oil comply with new World Regulations/specs.

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]

kalyan

I will post here when I get mine... supposed to arrive on Wednesday. My guess is it is not "FS" otherwise, the seller would have mentioned it.

Macster

Deleted.

"02996ttx50

finally! a professional here co-signing my mixing of viscosities. though it was suggested to me by pros in the first place lol

i have been doing this for years. i used to have symptoms of "screeching" at startup if the car was outdoors in heat if parked long term, when running 0/40. it's just too thin for 100+ ambient outdoor temps, whereas 5/40 or 5/50 eliminates that seemingly oil starved condition my car exhibits in very high outdoor temps.

since blending, i have never again heard that godawful sound.

PCA1983

Exactly!!! This new one is not a better oil. It is lower viscosity to eke out a bit higher fuel economy for the greenie laws. It has lower viscosity for the gteenies, but higher ash and lower flash point. So I ain't buyin it! This is not better oil! Nothing to do with higher performance. Run out tomorrow to Wal-Mart or Sam's or wherever and buy all the old formula 0-40W Mobil 1 you can find! Or switch to 0-50W or 5-50W and forget about greenie placating.

jimq

Mine will be here tomorrow. I will check when I get home.

Kevin

Another "oil" topic.. Motul has released a new Sport 5W50 oil. I am testing it..

"02996ttx50

...just another slow ( fake ) news day is all.

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

"02996ttx50

i wanna know is... what purist here is running pentosin 5/40!

Kevin

Another thread to offer other opinions

https://bobistheoilguy.com/forums/ub...ection_ratings