5w-30

[32spoke]

https://www.valvolineglobal.com/en/...erstanding-the-viscosity-index-of-motor-oils/

https://shieldoils.com/engine-oil-breakdown-high-temperature/


https://amsoilasiapacific.com/what-does-viscosity-really-mean-for-your-motor-oil/

oops, I wrote that 5W30 was for a low temp threshold of 20 degrees Fahrenheit, it is actually MINUS, yes -20 degrees Fahrenheit.. my bad

https://bobistheoilguy.com/forums/threads/t24-a-fts-turbo-engine.400187/

^^^^^^^

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[32spoke]

No—we’re not doing this again. You’ve already made your position clear, and you’re not engaging with the actual topic of the thread.

You are spot on…

 

[24tacoman]

That’s not going to prove what you think it will.


One truck, two oil changes, and a couple UOAs isn’t controlled testing—that’s anecdotal.


UOAs are diagnostic tools, not a way to overturn manufacturer specs. If it were that easy, the industry would’ve done it already.

Fair enough. There is no reason to assume 5w30 would protect any better than what the engineers tested the engine with and approved it for (0w20). I’m just saying if I do both oil analyses and the 5w30 shows less wear materials on the same OCI and driving conditions, that would convince me to make the switch. If you actually look at the stats for these oils, 0w20 and 5w30 are very similar in viscosity, and the actual measured viscosity varies from brand to brand. I don’t think putting 5w30 in a hard working engine would do it any harm.

 

[maxx075]

https://www.valvolineglobal.com/en/...erstanding-the-viscosity-index-of-motor-oils/

https://shieldoils.com/engine-oil-breakdown-high-temperature/


https://amsoilasiapacific.com/what-does-viscosity-really-mean-for-your-motor-oil/

oops, I wrote that 5W30 was for a low temp threshold of 20 degrees Fahrenheit, it is actually MINUS, yes -20 degrees Fahrenheit.. my bad

https://bobistheoilguy.com/forums/threads/t24-a-fts-turbo-engine.400187/

I could care less lol, I was just making fun of the guy above me.

 

[DENNISD]

I could care less lol, I was just making fun of the guy above me.

Nice

 

[EatMyTaco]

That’s not going to prove what you think it will.


One truck, two oil changes, and a couple UOAs isn’t controlled testing—that’s anecdotal.


UOAs are diagnostic tools, not a way to overturn manufacturer specs. If it were that easy, the industry would’ve done it already.

So there’s no reasonable way to generate data that you will accept, yet you don’t provide any of your own besides “it’s in the manual (in the United States).”

why don’t you outline what data you would accept. What testing regime is acceptable to you? What bar do you need to have cleared.

saying no is easy. Define the parameters.

 

[MustardTiger]

Someone running 5w30 should post their UOA! If the test shows improved wear performance over 0w20 UOA’s taken at the same OCI and under the same driving conditions, then we will have an answer. I’m planning on switching to 5w30 this summer for one change and getting it tested, and testing the 0w20 I drained before putting the 5w30 in. I will post results when I do this. I am having a hard time shipping my oil samples to Blackstone, as I am in Canada and Canada Post considers a tiny bottle of oil a dangerous good so they won’t ship it…

I would absolutely do a UOA but finding it difficult to source a place to do it. If you're in the Edmonton area...I think you have some local options...

@DENNISD dude, if this thread and it's posts trigger you that much, and you have to beat your chest with jugs of 0w20 in protest of us using 5w30...as has already been said, you're not engaging with the actual topic and purpose of this thread. Be a responsible adult and just leave, you're not making any positive contributions to the discussion here

 

[DENNISD]

I would absolutely do a UOA but finding it difficult to source a place to do it. If you're in the Edmonton area...I think you have some local options...

@DENNISD dude, if this thread and it's posts trigger you that much, and you have to beat your chest with jugs of 0w20 in protest of us using 5w30...as has already been said, you're not engaging with the actual topic and purpose of this thread. Be a responsible adult and just leave, you're not making any positive contributions to the discussion here

This is just as frustrating on my end.


What’s being presented as “tests” here really aren’t useful for measuring anything meaningful. A couple UOAs, pressure readings, or one-off comparisons don’t establish improved wear or durability—they’re anecdotal.


The reason I’m engaging is for the people reading along. Without context, this kind of information can be misleading. There’s still no actual evidence showing 5W-30 improves outcomes in this engine—and that’s the entire point.


At best, you end up in the same place. At worst, you’re running outside the validated spec with no demonstrated benefit.


And no—I’m not “triggered.” I’m applying the same standard of evidence across the board.

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