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When oil gets to the varnish producing stage #4467402
07/22/17 07:15 PM
07/22/17 07:15 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline OP
Merkava_4  Offline OP
Joined: Jan 2007
Posts: 17,501
Clovis, CA
You guys are always saying that varnish is harmless, but I'd say when oil gets to the varnish producing stage, its lubricating abilities have been compromised. What you say to that ?

Re: When oil gets to the varnish producing stage [Re: Merkava_4] #4467408
07/22/17 07:22 PM
07/22/17 07:22 PM
Joined: Mar 2015
Posts: 10,792
In the shop
53' Stude Offline
53' Stude  Offline
Joined: Mar 2015
Posts: 10,792
In the shop
That's a very nice assumption wink


09' Camry LE, 141,020 miles

PP 5w30 and TG 4967
Re: When oil gets to the varnish producing stage [Re: Merkava_4] #4467416
07/22/17 07:26 PM
07/22/17 07:26 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline OP
Merkava_4  Offline OP
Joined: Jan 2007
Posts: 17,501
Clovis, CA
popcorn

Re: When oil gets to the varnish producing stage [Re: Merkava_4] #4467428
07/22/17 07:43 PM
07/22/17 07:43 PM
Joined: Mar 2015
Posts: 10,792
In the shop
53' Stude Offline
53' Stude  Offline
Joined: Mar 2015
Posts: 10,792
In the shop
My 96 Bonneville has some light varnish under each valve cover. Guess that means the DELO 10w30 I have used for over 60k is bad eh? Why don't you tell us Merk? horse

Last edited by car51; 07/22/17 07:43 PM.

09' Camry LE, 141,020 miles

PP 5w30 and TG 4967
Re: When oil gets to the varnish producing stage [Re: Merkava_4] #4467440
07/22/17 07:51 PM
07/22/17 07:51 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline OP
Merkava_4  Offline OP
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Varnish is a sticky substance, so if oil is getting to the point where it's sticky, how's it gonna lubricate ?

Re: When oil gets to the varnish producing stage [Re: Merkava_4] #4467441
07/22/17 07:53 PM
07/22/17 07:53 PM
Joined: Jul 2011
Posts: 336
San Diego, CA
Joenpb Offline
Joenpb  Offline
Joined: Jul 2011
Posts: 336
San Diego, CA
I'd want to change it before it gets to the varnish stage.

Re: When oil gets to the varnish producing stage [Re: Merkava_4] #4467442
07/22/17 07:55 PM
07/22/17 07:55 PM
Joined: Dec 2002
Posts: 40,845
'Stralia
Shannow Online content
Shannow  Online Content
Joined: Dec 2002
Posts: 40,845
'Stralia
I disagree...

There's the varnish production stage, which will take place immediately in places, and in tiny quantities. It's slowed by anti-oxidants, but not stopped.

It build up in the oil, being dispersed in the oil...hotter oil holds more, colder oil holds less...that's why it plates out in places like rocker covers and turbine steam valve control gear. It gets dissolved in the hot parts, and dropped

When the oil, even hot cannot hold the products, then it's runaway.

Even at this end stage, in heavy equipment, the oil still lubricates, but there's risk of losing control of where and how much it goes.

So I disagree...until you get to the runaway stage...but the oil is shagged by that point, not in the least because of it's varnish potential.


Not everything is a conspiracy...only the important stuff ontome
Re: When oil gets to the varnish producing stage [Re: Joenpb] #4467443
07/22/17 07:55 PM
07/22/17 07:55 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline OP
Merkava_4  Offline OP
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Originally Posted By: Joenpb
I'd want to change it before it gets to the varnish stage.


Now you talkin'!!! thumbsup happy

Re: When oil gets to the varnish producing stage [Re: Merkava_4] #4467504
07/22/17 09:08 PM
07/22/17 09:08 PM
Joined: Dec 2006
Posts: 18,620
Dallas,Tx USA
aquariuscsm Offline
aquariuscsm  Offline
Joined: Dec 2006
Posts: 18,620
Dallas,Tx USA
Originally Posted By: Merkava_4
You guys are always saying that varnish is harmless, but I'd say when oil gets to the varnish producing stage, its lubricating abilities have been compromised. What you say to that ?


I agree. Plus that sticky varnish I think would eventually slowly begin to start clogging imperative passageways/rings/etc up.


1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Quaker State Ultimate Durability 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Quaker State Ultimate Durability 5W20

Re: When oil gets to the varnish producing stage [Re: Merkava_4] #4467524
07/22/17 09:33 PM
07/22/17 09:33 PM
Joined: Jan 2009
Posts: 13,834
Illinois
tig1 Offline
tig1  Offline
Joined: Jan 2009
Posts: 13,834
Illinois
When oil starts to create varnish the oil is oxidizing. Not good.


2007 Ford Fusion 232,000 miles
M1 0-20 EP
2017 Ford Fusion 55K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters

Re: When oil gets to the varnish producing stage [Re: Merkava_4] #4467574
07/22/17 10:52 PM
07/22/17 10:52 PM
Joined: Sep 2010
Posts: 7,485
S California
OneEyeJack Offline
OneEyeJack  Offline
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Posts: 7,485
S California
Would this help?

Re: When oil gets to the varnish producing stage [Re: Merkava_4] #4467673
07/23/17 05:18 AM
07/23/17 05:18 AM
Joined: Jun 2002
Posts: 2,706
Southeastern USA
FowVay Offline
FowVay  Offline
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Posts: 2,706
Southeastern USA
That's a good read, OneEye.


Quaker State across the board.
Re: When oil gets to the varnish producing stage [Re: OneEyeJack] #4467819
07/23/17 09:19 AM
07/23/17 09:19 AM
Joined: Jan 2016
Posts: 802
NC
Vladiator Offline
Vladiator  Offline
Joined: Jan 2016
Posts: 802
NC
Great read there! Really connects the dots.


2000 Lexus GS300-361k
1999 Lexus GS400-213k
2006 Toyota Camry-187k
2006 Toyota Highlander Hybrid-125k
2009 Scion xB-120k
2013 VW Tiguan-120k
2009 Toyota Tacoma-60k
Re: When oil gets to the varnish producing stage [Re: Merkava_4] #4468134
07/23/17 03:55 PM
07/23/17 03:55 PM
Joined: Dec 2002
Posts: 40,845
'Stralia
Shannow Online content
Shannow  Online Content
Joined: Dec 2002
Posts: 40,845
'Stralia


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