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#4638401 - 01/18/18 04:16 AM Lowest NOACK ?
ChrisD46 Offline


Registered: 09/10/10
Posts: 1905
Loc: GA.
Generally speaking , how would you rate these synthetic oils from lowest to highest NOACK ?

My guess would be :
5W20
0W20
5W30
0W30

I can run any of these oils but lowest NOACK appears to play nicer (i.e. intake deposits) in a DI engine.
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2017 Hyundai Sonata 2.4L GDI 4 cylinder
2010 Hyundai Elantra 2.0L 4 cylinder
2007 Kia Sedona 3.8L 6 cylinder

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#4638441 - 01/18/18 06:46 AM Re: Lowest NOACK ? [Re: ChrisD46]
skyactiv Online   content


Registered: 03/02/13
Posts: 4408
Loc: The Midwest
Amsoil signature series, redline, Castriol edge bio. Pennzoil platinum euro 0w30 states lower inlet deposits. The add pack plays a role.
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#4638471 - 01/18/18 07:42 AM Re: Lowest NOACK ? [Re: ChrisD46]
Virtus_Probi Offline


Registered: 06/25/15
Posts: 3972
Loc: New England
This is just one brand (and a boutique one at that), but the NOACKs for the Amsoil SS line are conveniently available on a single PDS page...
5W20 5.8%
5W30 6.7%
0W20 8.5%
0W30 8.8%.
IMHO, these results are all quite good.
If we mix in the non-"dexos1 Gen 2" grades, it's a little more confusing (quotes because these oils don't actually have that license)...
10W30 4.1%
5W20 5.8%
5W50 6.1%
5W30 6.7%
0W40 7.7%
0W20 8.5%
0W30 8.8%.
Still nice numbers all around...I have to assume that 5W50 beats 5W30 and 0W40 beats 0W30 and 0W20 due to different base oils, but I'm just guessing there. Interesting to note that the XW30s are not high HTHS oils, all around 3.1 for that test.
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#4638543 - 01/18/18 08:46 AM Re: Lowest NOACK ? [Re: ChrisD46]
ARCOgraphite Offline


Registered: 05/17/09
Posts: 11970
Loc: N.H, U.S.A.
Never found it to matter unless tackling competition motorsports.

After a 1 hour DP solvent burn-off what's the NOACK of a the oil going forward?
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#4638629 - 01/18/18 10:07 AM Re: Lowest NOACK ? [Re: ChrisD46]
CT8 Offline


Registered: 10/09/14
Posts: 11025
Loc: Idaho
You are chasing the wrong thing by chasing the lowest NOACK number for intake valve deposits. The crank case is full of oil spray, oil vapor and blow by gases and conbustion by product particles.
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#4638690 - 01/18/18 11:17 AM Re: Lowest NOACK ? [Re: ChrisD46]
Linctex Offline


Registered: 12/31/16
Posts: 6178
Loc: Waco, TX
Apparently, PCV line "catch cans" don't seem to help the issue much (or at all?)
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#4638805 - 01/18/18 01:09 PM Re: Lowest NOACK ? [Re: CT8]
Crobinson16 Offline


Registered: 06/28/16
Posts: 63
Loc: PENNSYLVANIA
Originally Posted By: CT8
You are chasing the wrong thing by chasing the lowest NOACK number for intake valve deposits. The crank case is full of oil spray, oil vapor and blow by gases and conbustion by product particles.


What oil properties should be considered when looking to combat di valve deposits

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#4638866 - 01/18/18 02:04 PM Re: Lowest NOACK ? [Re: Crobinson16]
CT8 Offline


Registered: 10/09/14
Posts: 11025
Loc: Idaho
Originally Posted By: Crobinson16
Originally Posted By: CT8
You are chasing the wrong thing by chasing the lowest NOACK number for intake valve deposits. The crank case is full of oil spray, oil vapor and blow by gases and conbustion by product particles.


What oil properties should be considered when looking to combat di valve deposits
the deposits are more than just the oil noack.
_________________________
"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf

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#4638918 - 01/18/18 03:13 PM Re: Lowest NOACK ? [Re: ChrisD46]
mctmatt Offline


Registered: 07/05/15
Posts: 241
Loc: TX-Texas
Chris, here is a link that you might want to read as I thought it had some good information http://www.aa1car.com/library/intake_valve_deposits_gdi_engines.htm

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#4642553 - 01/22/18 06:41 AM Re: Lowest NOACK ? [Re: ChrisD46]
ChrisD46 Offline


Registered: 09/10/10
Posts: 1905
Loc: GA.
Thanks for the replies - looks like using top tier gas , synthetic 5W30 and OCI's of approx. 4,000 miles for suburban driving near a big city is a good bet for GDI engines .
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2017 Hyundai Sonata 2.4L GDI 4 cylinder
2010 Hyundai Elantra 2.0L 4 cylinder
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#4643209 - 01/22/18 05:25 PM Re: Lowest NOACK ? [Re: ChrisD46]
slacktide_bitog Online   content


Registered: 03/20/08
Posts: 6183
Loc: USA
The Castrol Edge 0w30 has a NOACK of 8.3, but it's a thick 30, almost a 40

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#4643213 - 01/22/18 05:27 PM Re: Lowest NOACK ? [Re: ChrisD46]
PandaBear Offline


Registered: 08/05/02
Posts: 14220
Loc: Silicon Valley
Based on what Valvoline's PDS said it would be the 5w20 and 10w30.
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