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Is 5w-20 has better adhesive to metal than 0w-20? #4687713
03/07/18 04:41 PM
03/07/18 04:41 PM
Joined: Jul 2016
Posts: 4
Canada
flash_os Offline OP
flash_os  Offline OP
Joined: Jul 2016
Posts: 4
Canada
Is 5w-20 has better adhesive to metal than 0w-20 in cold weather?

Since 0w-20 has lower thickness on cold weather thus less adhesive when you left your car for a night more oil will be in oil pan.

Somebody tried to test it on any car scrap metal in your garage environment?

Re: Is 5w-20 has better adhesive to metal than 0w-20? [Re: flash_os] #4687724
03/07/18 04:47 PM
03/07/18 04:47 PM
Joined: Jun 2002
Posts: 19,235
Iowegia - USA
MolaKule Offline
MolaKule  Offline
Joined: Jun 2002
Posts: 19,235
Iowegia - USA
Originally Posted By: flash_os
Is 5w-20 has [have] better adhesive to metal than 0w-20 in cold weather?



No.

There are additives added to motor oils to prevent metal contact on startup, and those additives are deposited on the metals even after drain-off.

Last edited by MolaKule; 03/07/18 04:50 PM.

Reading is fundamental; understanding is not a given ability.
Re: Is 5w-20 has better adhesive to metal than 0w-20? [Re: flash_os] #4687766
03/07/18 05:21 PM
03/07/18 05:21 PM
Joined: Jan 2018
Posts: 19
PNW
T4RF Offline
T4RF  Offline
Joined: Jan 2018
Posts: 19
PNW
Man there is so much distrust of 0W oil on this forum! I remember when synthetics really started breaking into the mainstream, and I heard much of the same ďcanít protect as well as REAL oil, hurts all your seals and makes your engine leak!Ē

Re: Is 5w-20 has better adhesive to metal than 0w-20? [Re: flash_os] #4687784
03/07/18 05:39 PM
03/07/18 05:39 PM
Joined: Apr 2017
Posts: 1,480
Ontario, Canada
mightymousetech Offline
mightymousetech  Offline
Joined: Apr 2017
Posts: 1,480
Ontario, Canada
+1!

There is no such thing as too thin when cold.


Mighty Mouse Tech
BMW Tech, Former Acura Tech
2010 Civic Si Castrol 0W40, Redline MTL
2013 BMW 135i M Sport Edition Castrol 0W40, Redline MTL
Re: Is 5w-20 has better adhesive to metal than 0w-20? [Re: flash_os] #4687804
03/07/18 06:00 PM
03/07/18 06:00 PM
Joined: Mar 2016
Posts: 1,351
toronto
PeterPolyol Offline
PeterPolyol  Offline
Joined: Mar 2016
Posts: 1,351
toronto
It's a matter of the 'polarity' of the molecules; how much they stick to parts, so the chemical formulation of the oil makes the difference rather than the viscosity rating. Like Molakule said, they pay attention to polarity and solubility and tailor the products accordingly, regardless of viscosity.

Re: Is 5w-20 has better adhesive to metal than 0w-20? [Re: flash_os] #4687826
03/07/18 06:18 PM
03/07/18 06:18 PM
Joined: Aug 2002
Posts: 14,424
Silicon Valley
PandaBear Offline
PandaBear  Offline
Joined: Aug 2002
Posts: 14,424
Silicon Valley
Look at it this way, eventually oil cling to metal (cylinder wall and bearing) will all drain down to the sump over night. So it is better to have a thinner oil that can pump to where you want, than thicker oil that will eventually drip down no matter what.


"You keep asking questions PandaBear and you'll end up a vegetarian like my wife" - Camu Mahubah
Re: Is 5w-20 has better adhesive to metal than 0w-20? [Re: PandaBear] #4687910
03/07/18 07:22 PM
03/07/18 07:22 PM
Joined: Dec 2016
Posts: 6,232
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,232
Waco, TX
Originally Posted By: PandaBear
Look at it this way, eventually oil cling to metal (cylinder wall and bearing) will all drain down to the sump over night.


You should disassemble an engine that hasn't run for several years...

it will surprise you how much oil DID NOT run down..... over the course of years.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Is 5w-20 has better adhesive to metal than 0w-20? [Re: PandaBear] #4688139
03/07/18 10:54 PM
03/07/18 10:54 PM
Joined: Oct 2004
Posts: 5,734
Texas, Mentone for work, Galve...
Bryanccfshr Offline
Bryanccfshr  Offline
Joined: Oct 2004
Posts: 5,734
Texas, Mentone for work, Galve...
Originally Posted By: PandaBear
Look at it this way, eventually oil cling to metal (cylinder wall and bearing) will all drain down to the sump over night. So it is better to have a thinner oil that can pump to where you want, than thicker oil that will eventually drip down no matter what.


Thatís not how it works, thatís not how any of this works!


2018 Trd Pro 4Runner M1 0w40
2018 Tacoma off-road Castrol 5w30 Magnatec
Re: Is 5w-20 has better adhesive to metal than 0w-20? [Re: flash_os] #4688287
03/08/18 04:44 AM
03/08/18 04:44 AM
Joined: May 2008
Posts: 84
Littleton, CO
jtfmdyk Offline
jtfmdyk  Offline
Joined: May 2008
Posts: 84
Littleton, CO
When you shut down the oil is warm and 5w-20 should equal 0w-20. By the time things would have cooled enough to cause a difference in viscosity any oil that would drain from internals has long since done so.


2003 S2000
2002 CR-V
2006 Accord EX
Re: Is 5w-20 has better adhesive to metal than 0w-20? [Re: flash_os] #4688305
03/08/18 05:50 AM
03/08/18 05:50 AM
Joined: Oct 2015
Posts: 2,655
Balearic Islands , Spain
FordCapriDriver Offline
FordCapriDriver  Offline
Joined: Oct 2015
Posts: 2,655
Balearic Islands , Spain
Originally Posted By: flash_os
Is 5w-20 has better adhesive to metal than 0w-20 in cold weather?

Since 0w-20 has lower thickness on cold weather thus less adhesive when you left your car for a night more oil will be in oil pan.

Somebody tried to test it on any car scrap metal in your garage environment?

Oil never fully drains down, not even the thinnest synthethic 0W-20 or 0W-16, there is always a film of oil left, that is enough to lubricate the engine for the first few seconds of running until the oil has flowed everywhere.
The one and only time in an engine's life that there is a true "dry" start would be the first time the engine is ever run after being put together, or after a rebuild, although every engine rebuilder i know uses plenty of oil and grease on bearings and such when putting together an engine, and they prime it up first before starting it.
Some oils have greater polarity, meaning they wll "cling" a little more to metal than others after shut off.
Conventional oils, specially something thick like a Group I 20W-50 loaded with sticky VII's "sticks" more to metal than say a Group IV PAO synthetic, they drain off faster.


1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.

1988 Ford Escort Mk4 Xr3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.
Re: Is 5w-20 has better adhesive to metal than 0w-20? [Re: flash_os] #4688412
03/08/18 08:44 AM
03/08/18 08:44 AM
Joined: Jul 2015
Posts: 4,624
Down Under
SR5 Offline
SR5  Offline
Joined: Jul 2015
Posts: 4,624
Down Under
Castrol Magnatec


Penrite Vantage 10W40 SN & A3/B4 + Wesfil-Cooper Z154
Re: Is 5w-20 has better adhesive to metal than 0w-20? [Re: flash_os] #4689798
03/09/18 05:53 PM
03/09/18 05:53 PM
Joined: Jul 2016
Posts: 4
Canada
flash_os Offline OP
flash_os  Offline OP
Joined: Jul 2016
Posts: 4
Canada
Let check the facts...
Somebody tried to make experiment on scrap metal?

Re: Is 5w-20 has better adhesive to metal than 0w-20? [Re: flash_os] #4689876
03/09/18 07:13 PM
03/09/18 07:13 PM
Joined: Dec 2002
Posts: 40,884
'Stralia
Shannow Offline
Shannow  Offline
Joined: Dec 2002
Posts: 40,884
'Stralia
Originally Posted By: flash_os
Let check the facts...
Somebody tried to make experiment on scrap metal?


Plenty of us have checked the facts...pulled apart engines, and the pistons and bearings are full of oil. Held there by capillary action, regardless of viscosity.


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