5w-30

[Deleted member 4829]

I wouldn't mess with Toyota at all, esp. right now with the V35 issues. It's 0w20 until the warranty is out. Then and only then , I "might" consider 0w30. (in the summer) I tow around 5600 pounds and carry more weight on the truck. (riders and some cargo)

Why just for the summer? 0W-30 is rated for extreme cold temperatures. You should be running it year round; especially considering that you tow at close to the limit.

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[BLtheP]

I wouldn't mess with Toyota at all, esp. right now with the V35 issues. It's 0w20 until the warranty is out. Then and only then , I "might" consider 0w30. (in the summer) I tow around 5600 pounds and carry more weight on the truck. (riders and some cargo)

This is a silly stance. The V35A has precisely zero to do with what you should or shouldn’t do to your Tacoma.

 

[DENNISD]

This is a silly stance. The V35A has precisely zero to do with what you should or shouldn’t do to your Tacoma.

I don't think that's a silly stance at all.

The V35 issue may have nothing to do with the T24A-FTS mechanically, but it certainly reminds owners that warranty support matters.

If someone wants to stay with the specified viscosity until they're out of warranty, that's a perfectly rational decision. After all, if something major happens, the first question isn't going to be whether the oil caused it—it's whether you've followed the manufacturer's recommendations.

Personally, I don't think 0W-30 would suddenly cause a problem, but I can completely understand why someone would choose to eliminate even the possibility of a warranty discussion while coverage is still in effect.

That's a risk-management decision, not a lubrication argument.

 

[maxx075]

Y'all done done it and got @DENNISD back in here

 

[DENNISD]

Y'all done done it and got @DENNISD back in here

Nah... I was just dangling some bait for the forum's greatest minds.

Looks like it worked.

 

[djevans]

This is a silly stance. The V35A has precisely zero to do with what you should or shouldn’t do to your Tacoma.

I'm good with the reply. I feel it's a reasonable position. Toyota is not going to play any games. I'd say they have quite a list of problems right now. But hey, you "may" know more than their engineers, and hey they might be wrong too. It's was a recommendation, not a test of wills. Stay "exactly" in warranty for the best protection.

 

[Andrace]

"The data clearly says the best oil for a Duramax engine is not the one they send
it with."

@DENNISD
The closest thing to the testing you've been asking for. Enjoy this one.

 

[DENNISD]

"The data clearly says the best oil for a Duramax engine is not the one they send
it with."

@DENNISD
The closest thing to the testing you've been asking for. Enjoy this one.

I'll watch it, but even if the conclusion is correct for a Duramax, that's still a Duramax-specific conclusion.

That's actually been my point throughout this thread.

The fact that one manufacturer, one engine family, or one application benefits from a different viscosity doesn't automatically prove the same thing for every engine.

If that video shows a Duramax performs better on a different oil than the factory fill recommendation, then great—that would be evidence for a Duramax.

The question remains the same for the T24A-FTS:

What evidence shows that moving from 0W-20 to 5W-30 produces measurably better wear, durability, or reliability in this engine?

That's the claim I've been asking people to support.

 

[BLtheP]

I'll watch it, but even if the conclusion is correct for a Duramax, that's still a Duramax-specific conclusion.

That's actually been my point throughout this thread.

The fact that one manufacturer, one engine family, or one application benefits from a different viscosity doesn't automatically prove the same thing for every engine.

If that video shows a Duramax performs better on a different oil than the factory fill recommendation, then great—that would be evidence for a Duramax.

The question remains the same for the T24A-FTS:

What evidence shows that moving from 0W-20 to 5W-30 produces measurably better wear, durability, or reliability in this engine?

That's the claim I've been asking people to support.

Just wait for lake speed jr to yank his 2.4L out of his truck and run the same tests on the dyno. Then we will finally know.

 

[DENNISD]

Just wait for lake speed jr to yank his 2.4L out of his truck and run the same tests on the dyno. Then we will finally know.

The funny part is that you actually help me prove my point.

If we need a controlled dyno test and teardown to know for sure, then we're probably not as certain about 5W-30's superiority as some people in this thread pretend to be.

 

[32spoke]

The funny part is that you actually help me prove my point.

If we need a controlled dyno test and teardown to know for sure, then we're probably not as certain about 5W-30's superiority as some people in this thread pretend to be.

The point is if 0w20 is a superior oil, why would Toyota not require for all world markets? As Lake said, it’s about mileage for the CAFE rating that the United States imposes upon automotive manufacturers that sell vehicles in the United States market.

 

[DENNISD]

The point is if 0w20 is a superior oil, why would Toyota not require for all world markets? As Lake said, it’s about mileage for the CAFE rating that the United States imposes upon automotive manufacturers that sell vehicles in the United States market.

Because "not required everywhere" and "superior everywhere" are two completely different things.

I've never argued that 0W-20 is the only oil this engine can run. In fact, the global Toyota charts clearly show otherwise.

What I keep challenging is the assumption that because Toyota permits thicker oils in some markets, it therefore follows that 0W-20 is not the best choice for North American operating conditions.

The CAFE argument explains why Toyota may prefer 0W-20 in North America. It does not prove that 0W-20 fails to provide adequate durability, nor does it prove that moving to 5W-30 produces measurably better long-term outcomes.

Those are separate claims.

If Lake's position is that CAFE influences viscosity recommendations, that's not particularly controversial. If the position is that this automatically means 5W-30 is the superior choice for durability in the T24A-FTS, then we're right back to the same question:

Where is the evidence showing that outcome in this engine?

Because so far, the evidence being presented shows that Toyota approves multiple viscosities globally. It doesn't show that owners running 0W-20 are making the wrong choice.

 

[shackley]

Because "not required everywhere" and "superior everywhere" are two completely different things.

I've never argued that 0W-20 is the only oil this engine can run. In fact, the global Toyota charts clearly show otherwise.

What I keep challenging is the assumption that because Toyota permits thicker oils in some markets, it therefore follows that 0W-20 is not the best choice for North American operating conditions.

The CAFE argument explains why Toyota may prefer 0W-20 in North America. It does not prove that 0W-20 fails to provide adequate durability, nor does it prove that moving to 5W-30 produces measurably better long-term outcomes.

Those are separate claims.

If Lake's position is that CAFE influences viscosity recommendations, that's not particularly controversial. If the position is that this automatically means 5W-30 is the superior choice for durability in the T24A-FTS, then we're right back to the same question:

Where is the evidence showing that outcome in this engine?

Because so far, the evidence being presented shows that Toyota approves multiple viscosities globally. It doesn't show that owners running 0W-20 are making the wrong choice.

I don't usually pay much attention to these arguments, but here in central/southern New Mexico with high 90s to low 100s every day in the summer, I run 5W-30 in the summer and 0W-20 in the winter where we get down to single digits. That's just a personal choice. My colleague in northern Chihuahua runs 5W-30 all year that's recommended for him. I figure since I'm a couple hundred miles north, I'll split the difference.

 

[DENNISD]

I don't usually pay much attention to these arguments, but here in central/southern New Mexico with high 90s to low 100s every day in the summer, I run 5W-30 in the summer and 0W-20 in the winter where we get down to single digits. That's just a personal choice. My colleague in northern Chihuahua runs 5W-30 all year that's recommended for him. I figure since I'm a couple hundred miles north, I'll split the difference.

Honestly, this is one of the more rational takes in the thread.

You're acknowledging that it's a personal choice based on climate, operating conditions, and your own comfort level rather than claiming Toyota got it wrong.

I don't have any issue with that position.

Where I've pushed back is when people take the next step and claim that 5W-30 is demonstrably superior for durability in this engine without actually having the data to support it.

"Personal preference within Toyota's approved viscosity range" is a much easier argument to defend than "Toyota's North American recommendation is wrong."

 

[32spoke]

I don't usually pay much attention to these arguments, but here in central/southern New Mexico with high 90s to low 100s every day in the summer, I run 5W-30 in the summer and 0W-20 in the winter where we get down to single digits. That's just a personal choice. My colleague in northern Chihuahua runs 5W-30 all year that's recommended for him. I figure since I'm a couple hundred miles north, I'll split the difference.

As you wrote, this undermines Dennis’s argument.. and again, my contention that Toyota only recommends 0w20 for CAFE rating. To the credit of Dennis, he want more than my anecdotal evidence, and he is correct. When oil samples are tested for this engine, making a comparison, then we will have an empirical answer. With heat management being a concern in hotter environments, it seems likely that Toyota offers oil viscosity as high as 10w30 for hot climates. Since the United States has the same high temps, like in Arizona as compared to Mexico, it begs the question as to why Toyota would only recommend 0w20 in the United States for this engine- to me. It is a logical argument but can only be verified by a Toyota power plant engineer familiar with the decision for only 0w20 for the United States, vs Mexico/spain/russia, etc…. Or an oil comparison test, on this engine.

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