0W20 for good protection?

[kschachn]

The initial fear of using 0w20 I had has since faded after researching the current GM 5.3 engine (mine) oiling system. There is a suction side of the pump that serves as oiling also vs the old suction just being to pick up oil from the sump. Saying that to say sometimes these engines are truly designed for 0w20.

No they are not. The engine is not designed “for” a grade here, but it may designed to tolerate one. That engine will operate just fine on an oil with a higher HT/HS as long as the winter rating is appropriate for the expected starting temperature.

Even more so no engine is designed for a certain winter rating, that is silly.

 

[PimTac]

0W20 can be good,too?

Are you asking the question again?

 

[kschachn]

Are you asking the question again?

It’s how you keep a thread going.

 

[Snagglefoot]

Regarding sump sizes, Chevy LS V-8’s started at 5 quarts, then went to 6 quarts and are now at 8 quarts. From the 2022 Silverado owners manual:

 

[CarfriendXX]

Why I come to this question is that all trend analyses have not shown increased element concentrations of 0W20 oils to thicker oils. Even under load on the racetrack and over 10000 kilometres, the results are sometimes better than with a 5W30 A3 oil under similar load. Since the motor is not thermally optimally tuned, you could try to control the heat balance a little better with a thinner oil.

 

[tyman]

Regarding sump sizes, Chevy LS V-8’s started at 5 quarts, then went to 6 quarts and are now at 8 quarts. From the 2022 Silverado owners manual:



View attachment 122027

And they went from 5W-30 down to 0W-20 during the transition from 6qts to 8qts.

 

[UncleDave]

Trust the manufacturer.
Except for OCI
Except for FCI
Except.........

 

[CarfriendXX]

See you here.

Both vehicles were loaded almost equally, often and trackdays and high loads, especially there in summer. 0W20 with American fuel and the "stronger" 5w30 with German fuel. I don't see any disadvantage even with such high loads that a 0W20 shows in the trends.
You have to calculate the wear per 1000 kilometres. Then these oils don't take anything. And that with hths 2.6 vs 3.57. At 100C there are 4mm2 /second in between


Links:

https://www.civicx.com/forum/threads/lusts-fk8-civic-type-r-track-street-build.38199/page-29

https://oil-club.de/index.php?thread/4486-ravenol-rsp-5w-30-honda-civic-typer-6-753-9-755km/

 

[kschachn]

Why I come to this question is that all trend analyses have not shown increased element concentrations of 0W20 oils to thicker oils. Even under load on the racetrack and over 10000 kilometres, the results are sometimes better than with a 5W30 A3 oil under similar load. Since the motor is not thermally optimally tuned, you could try to control the heat balance a little better with a thinner oil.

Yes the same useless nonsense you’ve tried to do since day one.

 

[CarfriendXX]

I don't find element analyses completely useless. But everyone disagrees

 

[kschachn]

I don't find element analyses completely useless. But everyone disagrees

They are not completely useless. But they are completely inadequate and unhelpful for what you are advocating and attempting to determine.

 

[CarfriendXX]

Well, good. If I have wear elements 0 after an oil change and after a runtime X I have xx ppm iron or aluminum, then I think this already says something about the engine and its wear. Especially if you observe trend analyses over years.

 

[kschachn]

Well, good. If I have wear elements 0 after an oil change and after a runtime X I have xx ppm iron or aluminum, then I think this already says something about the engine and its wear. Especially if you observe trend analyses over years.

Well it has already been discussed with you ad nauseam so you’re consistent by persisting. No matter what you imagine or believe, you cannot make comparative oil quality determinations via a $30 spectrographic analysis no matter how hard you try.

There are methods and tests to do so but this isn’t it.

 

[BMW Dom]

I thought you were going esp 5w30? Or was it m1 0w-40? I lost track

 

[ZeeOSix]

Thinner HTHS viscosity gives less MOFT to keep moving parts separated and from contacting and wearing. MOFT matters for added engine protection. Seems Ford has went with that mentality on some of their engines like the Coyote by going back to 5W-30.

 

[kschachn]

Thinner HTHS viscosity gives less MOFT to keep moving parts from contacting and wearing. MOFT matters for added engine protection. Seems Ford went with that mentality on some of their engines like the Coyote by going back to 5W-30.

Hard to escape physics.

 

[ZeeOSix]

Hard to escape physics.

Yep, the backbone of journal bearings for 400+ years at least. Oil film thickness has lived a long time in lubrication between moving parts in machines. The physics of Tribology never changes.

https://www.tribonet.org/wiki/history-of-journal-bearings/

 

[jstert]

mazda recommends 0w20 in north america for its cx5. my son’s cx5 with the same 2.5 n.a. skyactiv engine in southeast asia gets 5w30 from the dealer in mazda-labelled bottles. my 2014 toyota yaris specifies 5w30. from 2016 onwards the same yaris 1.5 engine in a rebadged mazda2 specifies 0w20.

i would choose 5w30 regardless. i refuse to play the government’s c.a.f.e. game.

 

[Bill_W]

mazda recommends 0w20 in north america for its cx5. my son’s cx5 with the same 2.5 n.a. skyactiv engine in southeast asia gets 5w30 from the dealer in mazda-labelled bottles. my 2014 toyota yaris specifies 5w30. from 2016 onwards the same yaris 1.5 engine in a rebadged mazda2 specifies 0w20.

i would choose 5w30 regardless. i refuse to play the government’s c.a.f.e. game.

I do have a question… Since C.A.F.E. is the reason for the 0w-20 choice would that also have a match to the fuel blend that C.A.F.E. requires too? And are you missing the computer programming could also be a match. Cooling is 30% oil but the hydraulic controlled engine parts of the engine.

Are you saying that oil viscosity is only one dimensional C.A.F.E. answer?

 

[kschachn]

I do have a question… Since C.A.F.E. is the reason for the 0w-20 choice would that also have a match to the fuel blend that C.A.F.E. requires too? And are you missing the computer programming could also be a match. Cooling is 30% oil?

Are you saying that it is only one dimensional C.A.F.E. answer?

Well that’s a new one that fuels are tailored to an oil grade. The answer is no. The EPA fuel economy tests use a standardized fuel that has repeatable and known properties.