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#4467402 - 07/22/17 07:15 PM When oil gets to the varnish producing stage
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: 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 ?

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#4467408 - 07/22/17 07:22 PM Re: When oil gets to the varnish producing stage [Re: Merkava_4]
car51 Offline


Registered: 03/12/15
Posts: 10251
Loc: Southwest PA
That's a very nice assumption wink
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2009 Toyota Camry LE

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#4467416 - 07/22/17 07:26 PM Re: When oil gets to the varnish producing stage [Re: Merkava_4]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
popcorn

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#4467428 - 07/22/17 07:43 PM Re: When oil gets to the varnish producing stage [Re: Merkava_4]
car51 Offline


Registered: 03/12/15
Posts: 10251
Loc: Southwest PA
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


Edited by car51 (07/22/17 07:43 PM)
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#4467440 - 07/22/17 07:51 PM Re: When oil gets to the varnish producing stage [Re: Merkava_4]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Varnish is a sticky substance, so if oil is getting to the point where it's sticky, how's it gonna lubricate ?

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#4467441 - 07/22/17 07:53 PM Re: When oil gets to the varnish producing stage [Re: Merkava_4]
Joenpb Offline


Registered: 07/04/11
Posts: 336
Loc: San Diego, CA
I'd want to change it before it gets to the varnish stage.

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#4467442 - 07/22/17 07:55 PM Re: When oil gets to the varnish producing stage [Re: Merkava_4]
Shannow Online   content


Registered: 12/12/02
Posts: 39824
Loc: '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.
_________________________
It's no wonder that truth is stranger than fiction...
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#4467443 - 07/22/17 07:55 PM Re: When oil gets to the varnish producing stage [Re: Joenpb]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Originally Posted By: Joenpb
I'd want to change it before it gets to the varnish stage.


Now you talkin'!!! thumbsup happy

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#4467504 - 07/22/17 09:08 PM Re: When oil gets to the varnish producing stage [Re: Merkava_4]
aquariuscsm Offline


Registered: 12/30/06
Posts: 18149
Loc: 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
Pennzoil Platinum 0W20



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#4467524 - 07/22/17 09:33 PM Re: When oil gets to the varnish producing stage [Re: Merkava_4]
tig1 Offline


Registered: 01/03/09
Posts: 13655
Loc: Illinois
When oil starts to create varnish the oil is oxidizing. Not good.
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2007 Ford Fusion 227,000 miles
M1 0-20 EP
2017 Ford Fusion 49K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters


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#4467574 - 07/22/17 10:52 PM Re: When oil gets to the varnish producing stage [Re: Merkava_4]
OneEyeJack Offline


Registered: 09/14/10
Posts: 7471
Loc: S California
Would this help?

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#4467673 - 07/23/17 05:18 AM Re: When oil gets to the varnish producing stage [Re: Merkava_4]
FowVay Offline


Registered: 06/02/02
Posts: 2678
Loc: Southeastern USA
That's a good read, OneEye.
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#4467819 - 07/23/17 09:19 AM Re: When oil gets to the varnish producing stage [Re: OneEyeJack]
Vladiator Offline


Registered: 01/04/16
Posts: 728
Loc: NC
Great read there! Really connects the dots.
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Thicker oils give protection for severe operations such as driving in mountains, pulling a boat, dusty conditions, short trips, high rpm, overloading, overheating and overcooling. Thin oils give MPG.

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#4468134 - 07/23/17 03:55 PM Re: When oil gets to the varnish producing stage [Re: Merkava_4]
Shannow Online   content


Registered: 12/12/02
Posts: 39824
Loc: 'Stralia

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