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#4557436 - 10/28/17 04:30 PM Thinner Oil provides better Oil Seal
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: Venezuela, South America
I browsing on this forum and I found this article: Thinner oil provides better oil seal where an User called autoreign said this:
Quote:
The article seem suggest that the oil flow on the piston rings pack is more likely to flow through the gap on each piston ring to get to the top ring. Hence, lower viscosity oil, being able to flow better, will provide a thicker oil film at bottom of the Top ring,


Do you really think that a thinner viscosity oil could make a better seal in the piston rings? I thought that a higher viscosity oil would be better for sealing because the general recommendation when a engine starts to use oil is to switch to a higher viscosity oil and in fact I have noticed 37% more oil consumption in my car with 15w40 than with 20w50 (maybe the oil viscosity isn't the one increasing my consumption but other factors)

I really don't want to talk about my car's oil consumption in this post, what I would like to know if you have noticed lower oil consumption with thinner oils. Or if there is another factor in oil selection that can lower oil consumption like HTHS, VI, base oil quality, NOACK, etc.

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#4557517 - 10/28/17 06:02 PM Re: Thinner Oil provides better Oil Seal [Re: Emanuel]
TheKracken Offline


Registered: 04/18/17
Posts: 515
Loc: Fort Worth TX
My 281k mile sienna doesn't use any oil when I ran it on 0w20. I switched to a heavier oil this last change and it doesn't use much oil either but it is noticeably more sluggish and oil temps are hotter. I plan to switch back soon.
_________________________
2011 Prius 96k miles RLI 5w20
97 Toy T100 4x4: amsoil 0w20 242k Miles
04 Toy Sienna awd: Pennzoil 0w20 281k Miles

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#4557555 - 10/28/17 06:38 PM Re: Thinner Oil provides better Oil Seal [Re: Emanuel]
Silk Offline


Registered: 07/26/03
Posts: 4556
Loc: New Zealand
Oil burning is caused by oil being pumped up the ring lands, and needs worn ring grooves to pump more oil, a thicker oil would help here. Blocked drain holes, gummed rings will burn oil too. Those on this site will say thinner oil will stop oil burning - I have never seen a thinner oil reduce oil consumption, but thicker usually will. If it's the same car you've been talking about, you cooked it and the rings have lost tension.
_________________________
1987 BMW R65 - Penrite V Twin 20/50
2005 Nissan Expert - Gulf Western 10W-40
1996 Volvo T5 - Penrite HPR15 - 15W-60. Ryco syntec filter.

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#4557684 - 10/28/17 08:09 PM Re: Thinner Oil provides better Oil Seal [Re: Silk]
Shannow Online   content


Registered: 12/12/02
Posts: 39858
Loc: 'Stralia
Originally Posted By: Silk
Those on this site will say thinner oil will stop oil burning - I have never seen a thinner oil reduce oil consumption, but thicker usually will.


Yeah, it's funny how the need to justify the OEM's push for thinner oils includes reduced oil consumption (and improved wear) as the "reason"...thinner just HAS to be better, because it's the U.S.

Which market stated that 1qt/1,000 miles was acceptable oil consumption ?

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#4557739 - 10/28/17 08:47 PM Re: Thinner Oil provides better Oil Seal [Re: Shannow]
Bryanccfshr Offline


Registered: 10/09/04
Posts: 5716
Loc: Durango, Co
I have owned 4Toyota’s with 1gr fe since the 0w20 became the thing in the USA, I am well aware of the broader viscosity ranges recommended outside the USA.
I think about trying an hdeo 5w30from time to time but the 0w20has never been consumed and never gave me a evidence based reason to not use it.


Edited by Bryanccfshr (10/28/17 08:47 PM)
_________________________
2018 Trd Pro 4Runner M1 0w40
2018 Tacoma off-road Castrol 5w30 Magnatec

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#4557741 - 10/28/17 08:47 PM Re: Thinner Oil provides better Oil Seal [Re: Silk]
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: Venezuela, South America
Originally Posted By: Silk
If it's the same car you've been talking about, you cooked it and the rings have lost tension.
The engine was overhauled 35k miles ago with new pistons, rings, gaskets, seals and bearings. It overheated pretty bad 12k miles ago, it burned 1.5 qt every 1k miles before the overheat and after the overheat 2.5 qt every 1k miles. My guess is that the cylinders arent perfectly round because of the wear.

Do you think that 35lk miles old rings could be cooked up?

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#4557742 - 10/28/17 08:49 PM Re: Thinner Oil provides better Oil Seal [Re: Emanuel]
JohnnyJohnson Online   content


Registered: 10/22/09
Posts: 2740
Loc: Wet side WA
Originally Posted By: Emanuel
Originally Posted By: Silk
If it's the same car you've been talking about, you cooked it and the rings have lost tension.
The engine was overhauled 35k miles ago with new pistons, rings, gaskets, seals and bearings. It overheated pretty bad 12k miles ago, it burned 1.5 qt every 1k miles before the overheat and after the overheat 2.5 qt every 1k miles. My guess is that the cylinders arent perfectly round because of the wear.

Do you think that 35lk miles old rings could be cooked up?


Emanuel I think its time to drive a newer car under your oil can so to speak.


Edited by JohnnyJohnson (10/28/17 08:52 PM)
_________________________
2004 Toyota Corolla 121682
Out: QSUD 5W-30 Purolator One 5030
In: Valvoline ML 5w-30 TG4967 117530 2-8-18
2006 Duramax 74047
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73752 4-22-18

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#4557744 - 10/28/17 08:52 PM Re: Thinner Oil provides better Oil Seal [Re: JohnnyJohnson]
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: Venezuela, South America
Originally Posted By: JohnnyJohnson
Originally Posted By: Emanuel
Originally Posted By: Silk
If it's the same car you've been talking about, you cooked it and the rings have lost tension.
The engine was overhauled 35k miles ago with new pistons, rings, gaskets, seals and bearings. It overheated pretty bad 12k miles ago, it burned 1.5 qt every 1k miles before the overheat and after the overheat 2.5 qt every 1k miles. My guess is that the cylinders arent perfectly round because of the wear.

Do you think that 35lk miles old rings could be cooked up?


Emanuel I think its time to drive a newer car under you oil can so to speak.


I live in Venezuela, we have 1200% accumulated inflation from the start of the year until now

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#4557752 - 10/28/17 08:57 PM Re: Thinner Oil provides better Oil Seal [Re: Emanuel]
Silk Offline


Registered: 07/26/03
Posts: 4556
Loc: New Zealand
Originally Posted By: Emanuel
Do you think that 35lk miles old rings could be cooked up?


By cooked I mean overheated - I doubt apart from a seizure anything has happened to new pistons in 35,000km.
_________________________
1987 BMW R65 - Penrite V Twin 20/50
2005 Nissan Expert - Gulf Western 10W-40
1996 Volvo T5 - Penrite HPR15 - 15W-60. Ryco syntec filter.

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#4557753 - 10/28/17 08:57 PM Re: Thinner Oil provides better Oil Seal [Re: Emanuel]
Bryanccfshr Offline


Registered: 10/09/04
Posts: 5716
Loc: Durango, Co
Originally Posted By: Emanuel
Originally Posted By: JohnnyJohnson
Originally Posted By: Emanuel
Originally Posted By: Silk
If it's the same car you've been talking about, you cooked it and the rings have lost tension.
The engine was overhauled 35k miles ago with new pistons, rings, gaskets, seals and bearings. It overheated pretty bad 12k miles ago, it burned 1.5 qt every 1k miles before the overheat and after the overheat 2.5 qt every 1k miles. My guess is that the cylinders arent perfectly round because of the wear.

Do you think that 35lk miles old rings could be cooked up?


Emanuel I think its time to drive a newer car under you oil can so to speak.


I live in Venezuela, we have 1200% accumulated inflation from the start of the year until now



In your situation I would simply run a hdeo for now, fuel,quality etc may be questionable and it is best to use traditional ways of preservation for longevity. That means a heavy duty engine oil changes more frequently with a focus on preventing overheats, and other damaging events.. I would spend more 9n your cooling system than lubrication until you have a more stable socio economic situation.
_________________________
2018 Trd Pro 4Runner M1 0w40
2018 Tacoma off-road Castrol 5w30 Magnatec

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#4557767 - 10/28/17 09:06 PM Re: Thinner Oil provides better Oil Seal [Re: Bryanccfshr]
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: Venezuela, South America
Originally Posted By: Bryanccfshr

In your situation I would simply run a hdeo for now, fuel,quality etc may be questionable and it is best to use traditional ways of preservation for longevity. That means a heavy duty engine oil changes more frequently with a focus on preventing overheats, and other damaging events.. I would spend more 9n your cooling system than lubrication until you have a more stable socio economic situation.
The overheat was caused because of a faulty radiator cap, I have the cooling system in optimal condition now.

So should I keep changing the oil every 3k miles or should I extend the interval?

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#4557768 - 10/28/17 09:07 PM Re: Thinner Oil provides better Oil Seal [Re: Silk]
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: Venezuela, South America
Originally Posted By: Silk
Originally Posted By: Emanuel
Do you think that 35lk miles old rings could be cooked up?


By cooked I mean overheated - I doubt apart from a seizure anything has happened to new pistons in 35,000km.
35k miles = 50k km

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#4557772 - 10/28/17 09:10 PM Re: Thinner Oil provides better Oil Seal [Re: Emanuel]
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: Venezuela, South America
Engine oil price has increased 2700% from March until now, so don't want to waste oil but I don't want to neglect the engine neither.

Do you think that a 4k miles interval would be safe? Or could I change the oil every 5k miles?

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#4557783 - 10/28/17 09:18 PM Re: Thinner Oil provides better Oil Seal [Re: Emanuel]
Bryanccfshr Offline


Registered: 10/09/04
Posts: 5716
Loc: Durango, Co
The interval is very dependent on your service conditions, fuel quality and engines mechanical condition.

I run 5w20in a Ford F-150 4.6v8 in dusty oilfiledmservice with a lot of idling, rough roads and minimal usa fuel standards. It has 100k. it and is running clean and strong and does not consume a noticableamou t between oil changes. I run this on 5k mile or 6month intervals. I think this is a safe distance and time for any modern fuel injected engine with a modern engine oil.
_________________________
2018 Trd Pro 4Runner M1 0w40
2018 Tacoma off-road Castrol 5w30 Magnatec

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#4557791 - 10/28/17 09:22 PM Re: Thinner Oil provides better Oil Seal [Re: Emanuel]
Bryanccfshr Offline


Registered: 10/09/04
Posts: 5716
Loc: Durango, Co
I don’t know what engine family or make you have but I really would lean to a (5w30or 10w30 mixed fleet hdeo for combine potential availability and detergency if you have to extend for unforeseen circumstances.
_________________________
2018 Trd Pro 4Runner M1 0w40
2018 Tacoma off-road Castrol 5w30 Magnatec

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