Low NOACK 5w20

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Hey guys, I have a new 2015 Sonata SE with the 2.4L GDI and I'm coming up on the first oil change. I already installed a catch can in the PCV line that has been collecting a good amount of oil, but I still want to take all precautions with the GDI. I'll probably stick with QS Ultimate Durability since it has fairly low NOACK and I usually stick with SOPUS products on my non-European cars.

Are there any other choices of 5w20 oils that will be acceptable for the Hyundai warranty and have NOACK at or under the QS which is around 8-9%?

Thanks.
 
Originally Posted By: skyactiv
Redline?


not acceptable for warranty.

ALM is another good, not acceptable option lol.
 
Last edited:
Originally Posted By: car51
Tony10s: didn't the old PU or was it PP SM stuff that had a low NOACK? Thinking out loud again


I believe it was the old Pennzoil Ultra that had the very low NOACK.
 
Originally Posted By: simple_gifts
Originally Posted By: skyactiv
Redline?


not acceptable for warranty.
ALM is another good, not acceptable option lol.



He's already installed a catch can...

OP,

Lot's of theories out there...

*Using Top Tier fuel and sticking with OEM oil recomendations
*Using GrpIV oils only
*Using low SAPs or Mid SAPs
*Using low TEOST GrpIII
*Using low Noack GrpIII at OEM recommended oci
*Using low Noack GrpIII at no more than 5k ml oci
*Using GrpII at no more than 5k ml oci
*Using oils containing the least amount of calcium additives (T-GDI)


http://papers.sae.org/2014-32-0092/

http://gf-6.com/sites/default/files/Turb...ig Hurdle.pdf

http://www.pecj.or.jp/japanese/overseas/conference/pdf/conference12-19.pdf
 
Last edited:
Originally Posted By: Tony10s
Originally Posted By: bourne
PYB


PYB 5w20 PQI Test Results


Yes, this is right. If you are also considering conventional oils, PYB 5W-20 and QSGB 5W-20 have low NOACK --- 6.5% and 7.8%, respectively.


I'm not sure i can trust those numbers are consistent when their very own TDS sheets show much higher numbers. Not saying that this sample is wrong. It could very well be that the glut of GTL Shell has/had on hand was used in all the products. For how long? Who knows.

http://royaldutchshellplc.com/2015/06/01...rm-opportunity/
 
Last edited:
Originally Posted By: wemay
Originally Posted By: simple_gifts
Originally Posted By: skyactiv
Redline?


not acceptable for warranty.
ALM is another good, not acceptable option lol.



He's already installed a catch can...

OP,

Lot's of theories out there...

*Using Top Tier fuel and sticking with OEM oil recomendations
*Using GrpIV oils only
*Using low SAPs or Mid SAPs
*Using low TEOST GrpIII
*Using low Noack GrpIII at OEM recommended oci
*Using low Noack GrpIII at no more than 5k ml oci
*Using GrpII at no more than 5k ml oci
*Using oils containing the least amount of calcium additives (T-GDI)


http://papers.sae.org/2014-32-0092/

http://gf-6.com/sites/default/files/Turb...ig Hurdle.pdf

http://www.pecj.or.jp/japanese/overseas/conference/pdf/conference12-19.pdf


Don't forget the higher volatility theory support.
 
Originally Posted By: Nederlander75
Originally Posted By: wemay
Originally Posted By: simple_gifts
Originally Posted By: skyactiv
Redline?


not acceptable for warranty.
ALM is another good, not acceptable option lol.



He's already installed a catch can...

OP,

Lot's of theories out there...

*Using Top Tier fuel and sticking with OEM oil recomendations
*Using GrpIV oils only
*Using low SAPs or Mid SAPs
*Using low TEOST GrpIII
*Using low Noack GrpIII at OEM recommended oci
*Using low Noack GrpIII at no more than 5k ml oci
*Using GrpII at no more than 5k ml oci
*Using oils containing the least amount of calcium additives (T-GDI)


http://papers.sae.org/2014-32-0092/

http://gf-6.com/sites/default/files/Turb...ig Hurdle.pdf

http://www.pecj.or.jp/japanese/overseas/conference/pdf/conference12-19.pdf


Don't forget the higher volatility theory support.


That's true, i just couldn't find it...
 
I have a feeling that we are misunderstanding NOACK and the oil in the pcv system
 
I believe you are probably quite correct here.... So, give a more detailed explanation. Because I would like to learn more about where your thought process is going
smile.gif

I sincerely appreciate learning new concepts on here. So where does this rabbit hole lead too..
 
Noack is tested at 250C, precisely because that's representative of piston ring belt temperatures, and the oil film that's left on the cylinder walls.

It's intent was to limit the volatility of the oil in those regions, and the access of that oil and the phosphorous direct access to the catalyst...think as the piston goes down, the oil film on the walls is exposed to combustion heat, oil and phosphorous volatises off, and on the exhaust stroke is pumped straight into the catalyst.

There's a view that has formed on BITOG that it is meaningless, as the sump oil gets nowhere near 250C, and therefore the oil doesn't "boil off"...it's the product of simplistic thinking, and not understanding the test or it's history.

As such, Noack is probably a poor indicator of vaporised oil in the PCV system. The stuff that is hit even by hot blowby has a lot of surface area and cooler oil to condense on on the way to the PCV.

(And as it turns out, isn't the best at predicting phosphorous transport to the catalyst).
 
Originally Posted By: wemay
Originally Posted By: simple_gifts
Originally Posted By: skyactiv
Redline?


not acceptable for warranty.
ALM is another good, not acceptable option lol.



He's already installed a catch can...

OP,

Lot's of theories out there...

*Using Top Tier fuel and sticking with OEM oil recomendations
*Using GrpIV oils only
*Using low SAPs or Mid SAPs
*Using low TEOST GrpIII
*Using low Noack GrpIII at OEM recommended oci
*Using low Noack GrpIII at no more than 5k ml oci
*Using GrpII at no more than 5k ml oci
*Using oils containing the least amount of calcium additives (T-GDI)


http://papers.sae.org/2014-32-0092/

http://gf-6.com/sites/default/files/Turb...ig Hurdle.pdf

http://www.pecj.or.jp/japanese/overseas/conference/pdf/conference12-19.pdf


I appreciate wemay's appreciaton for posting sae papers and studies to help inform people.
thumbsup2.gif
01.gif
 
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