Originally Posted by dave1251
Buster if you had a idea what you are talking about I would be offended. Get a clue it's not hard a 8CST Diester has a NOACK less than 2%. Buster explain how a ester base oil would have 4 times higher NOACK.
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4925392/noack-and-volativty-again
Let's see it.
Oh wait a 8CST PAO has a NOACK of 8%
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4666333/3
Explain. 18 years you have been here and you still are unable to comprehend it's not possible a 20 grade ester product has a NOACK over 8%.
I will wait for any possible explanation. Go ahead Buster.
Originally Posted by dave1251
It can't be 40% ester the NOACK and viscosity index values don't match not even close.
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4538460/3
Gentlemen, let's maintain civility please.
buster is a gentleman, and he must be celebrated for getting all this information from all these companies. No one else here has the same connections and communication skills.
There is nothing that contradicts buster here.
You can't make a 0W-20 from an 8 cSt base oil. It would fail the SAE 0W CCS and/or MRV tests. Typically 4 - 6 cSt is used. With the DDI package, 8 cSt becomes 10 cSt or more, which would result in a SAE xW-40 or a SAE xW-50 after you add the VII.
My
calculator gives 31 cSt and 5.8 cSt for the base-oil KV40 and KV100, respectively, for Red Line High-Performance 0W-20. Base-oil VI = 135. VII content = 5%. HTFS (base-oil + DDI-package viscosity at 150 °C) = 2.1 cSt, which is fairly typical for a 0W-20. Note that the DDI package adds to both the viscosity and viscosity index of the base oil; so, the actual base oil probably has KV100 = 4-5 cSt and VI ~ 130.
From ExxonMobil spec sheets, SpectraSyn 4 cSt PAO, SpectraSyn 6 cSt PAO, Esterex NP343 4 cSt POE, and Esterex NP541 5 cSt POE, have 14%, 6.4%, 4.6%, and 4.6% Noack, respectively. Their VI are 126, 138, 136, and 130, respectively. The DDI package, typically about 20% of the oil, could have a Noack over 15%.
There is nothing that contradicts the 40% ester information from Dave from Red Line here. A 40/60 POE/PAO mix would result in a Noack around 9-10%. Base-oil VI also checks. Everything is checking perfectly.
Thank you again, buster, for the inside information.