Originally Posted By: tig1
Originally Posted By: gryffinwings
Originally Posted By: tig1
Originally Posted By: SR5
I believe M1 contains PAO (Group 4) and Group 3, while SS is pure Group 3. So yes M1 is "better" because it contains PAO which should lower the Noack and the cold-cranking. But unless you are in a very cold climate or doing very long intervals, it shouldn't make a difference. A regular car, in a normal climate, with reasonable oil change intervals, it shouldn't make a fig of difference which one you use. They should both do their job and protect well.
There are many pure Group 3 synthetics out there that are well respected, they don't really say, but I'm guessing QSUD, Super Tech, Kendall GT-1, etc. All good stuff
Don't forget, All M1 badged oils contain esters as well. You are right that MSS is a grp 3.
Where did you get that info? I find that very interesting, does this include Mobil 1 High Mileage oil as well?
From XM and yes, all M1 badged oils contain esters. Here is a link from XM.
https://mobiloil.com/en/faq/ask-our-auto-experts/questions-for-auto-experts/what-is-ester-oil
I certainly agree that M1 is a good oil, and I certainly agree that some M1 oils have made use of esters in the past (I've seen a few references to this).
But their 2008 wording "Esters are one of the classes of synthetics that have been used in Mobil 1 oils" isn't very strong. It doesn't clearly say that all M1 products always have and always will use esters.
I think it's fairer to say that some M1 products are likely to contain esters.