Piston cleanleness

[Doublehaul]

Hey Gents,

Which oil regardless of grade is likely the best at keeping pistons and ring packs clean? What the highest cert on this?

 

[Bryanccfshr]

https://www.swri.org/sites/default/files/sequence-iiig-test.pdf
That test and TEOSt 33c are fairly predictive.

 

[burla]

You mean for the longest OCI? Any sn gf-5 oil will likely do a bang up job in young oil. Maybe PUP would be a call to make, stated high detergentcy.

 

[PandaBear]

Those with 15K-20K OCI recommendation run for short period of time. They are usually loaded with detergents.

 

[slo town]

Originally Posted by Bryanccfshr
https://www.swri.org/sites/default/files/sequence-iiig-test.pdf
That test and TEOSt 33c are fairly predictive.



If I read that attachment right, the SM/GF-4 oil leaves fewer deposits than the SN/GF-5 oils!

Scott

 

[StevieC]

Originally Posted by Bryanccfshr
https://www.swri.org/sites/default/files/sequence-iiig-test.pdf
That test and TEOSt 33c are fairly predictive.



This ^^^^

My choice would obviously be Amsoil, here are their results compared to 2 other brands:
https://www.amsoil.com/newsstand/motor-oil/articles/leading-the-field-in-deposit-protection/

Although I didn't look at the Pistons in my Santa Fe when the camshaft snapped the heads were spotless clean and new looking (picture posted here), not even any varnish in there after 300K miles and that was on their older formulation of Signature Series so I would imagine the newer formulation would be even better. (All speculation though, just want to be clear about that before someone calls me out)

I had near factory compression on all cylinders when it let go as well as I had just done the timing belt and I always measure the compression during the belt changes.

 

[Malo83]

My choice, Pennzoil,
https://www.pennzoil.com/en_us/educ...LzIwMTZuZXdzbGV0dGVyLz9sb2NhbGU9ZW5fdXM=

 

[1JZ_E46]

Noack is a decent proxy for piston deposits. The lower the better.

 

[buster]

TEOST is not that good bc it tests new oil not used. The Honda Hot Tube test is much better. The IIIG or F is also good.

 

[bbhero]

^^^^^^

HTO-06.

Not many oils mention this specification. Some say it's old and outdated. But it actually is a very good test still to this day.

 

[Triple_Se7en]

Originally Posted by buster
TEOST is not that good bc it tests new oil not used. The Honda Hot Tube test is much better. The IIIG or F is also good.



Which Mobil-1?

 

[CR94]

Originally Posted by StevieC

My choice would obviously be Amsoil, here are their results compared to 2 other brands: ...
Although I didn't look at the Pistons in my Santa Fe when the camshaft snapped the heads were spotless clean ...
Since you "didn't look at the Pistons," do you have other reasons to believe freedom from ring coking would necessarily correlate with cleanliness of heads?

 

[Bryanccfshr]

Originally Posted by SLO_Town
Originally Posted by Bryanccfshr
https://www.swri.org/sites/default/files/sequence-iiig-test.pdf
That test and TEOSt 33c are fairly predictive.



If I read that attachment right, the SM/GF-4 oil leaves fewer deposits than the SN/GF-5 oils!

Scott



It is counterintuitive scoring system but the gf 5 requires less deposit weight

 

[DirectRejection]

VW 508.00

 

[BrocLuno]

Valvoline Blue Restore. HDEO specifically designed to clean ring deposits. Pricey and not all that easy to come by, but hands down the best ring pak cleaner out there.

 

[Astro_Guy]

Forgive me the obvious question here, but why do you care? Over the last 30 years I have driven six vehicles from new to past 100k without ever having a set of rings replaced. Four of those engines went past 150k, including the Volvo in my signature. For that matter, my mother had a '69 Camaro with the 250 CID straight 6 that ran 250k on dino oils without any invasive work. Both oils and engines continue to get better; I think you may be buying into some marketing hype and worrying about nothing. Just my $0.02 worth...

 

[ZeeOSix]

Originally Posted by StevieC
Originally Posted by Bryanccfshr
https://www.swri.org/sites/default/files/sequence-iiig-test.pdf
That test and TEOSt 33c are fairly predictive.

This ^^^^

My choice would obviously be Amsoil, here are their results compared to 2 other brands:
https://www.amsoil.com/newsstand/motor-oil/articles/leading-the-field-in-deposit-protection/


Even though this is old data, those brands today would probably result in a similar ranking. One reason I went with Valvoline full synthetic (now called "Advanced").

 

[ZeeOSix]

Originally Posted by Bryanccfshr
It is counterintuitive scoring system but the gf 5 requires less deposit weight


30 mg is the GF-5 limit.

 

[jongies3]

The Redline high performance line of synthetics are chocked full of esters and other good high detergency ingredients. Comes at a hefty price though! My vote would be to run a HDEO a few short OCI's to clean up any dirty engine, then use a quality syn of your choosing and start stretching out the OCI's to your comfort or UOA specified zone!

 

[ZeeOSix]

ASTM D 6335 Summary. It addresses oil deposits formed when the oil comes in contact with very hot surfaces. The amount and type of "cleaning detergents" in the oil may not really matter for this kind of test.