Does 5W-30 REALLY protect better than 5W-20?

[Propflux01]

Manufacturers are not being extorted by the government. They may use any oil of their choosing during testing.

Then why the differences in countries outside the US? Are you going to tell us that Xw-20 is not available anywhere outside of the US, or maybe that the “Euro” oils are the only thing available in Europe? Seems I remember a time when a 5w-20 oil was darn near impossible to find over the 5w-30/10w-40/sae30w that we’re on the shelves everywhere here. Now it’s Xw-20 Everywhere. Sure, they may use any oil during testing, but when you gotta squeeze a car engine to get an overall fleet mileage to CAFE standards, then you might as well be extorted. They just need that engine to last it’s normal 6 years 150k miles, so that your loan is paid off, and it’s time for a new one. 5w-20 will get you there, sure. But it’s hardly an issue to make it available everywhere else if it were so good. In fact, it would be economically feasible to keep less different weights worldwide

 

[ka9mnx]

10w-40 to 10w-30: oils too thin. 10w-30 to 5w-30: oils too thin. 5w-30 to 5w-20: oils too thin. 5w-20 to 0w-16: oils too thin. And still no one here has or will keep their vehicle long enough to know the difference. Some folks are set in their ways just don't progress.

Here is a sample of my stable:
2000 4Runner 265k miles. 0w-20 runs quiet and uses no oil in 5-6k/1 year OCI's.
1993 F150 255k miles. Runs quiet and uses no oil in 5k/3 year OCI's. Has run on 5w-20 for my 20 years of ownership. 5w-30 in it now but will be 0w-20 next OCI.

 

[nicholas]

I haven’t heard anything about the 1.6T. Source?

My dealer has a TSB posted in their service center about the 5w-40 for the turbo veloster in the early years of production.

I'm sure it's on the Google.

 

[Propflux01]

My dealer has a TSB posted in their service center about the 5w-40 for the turbo veloster in the early years of production.

I'm sure it's on the Google.

My google fu must not be up to snuff, as I can’t find anything on it.

 

[tundraotto]

https://www.hyundai-forums.com/cdn-cgi/image/format=auto,onerror=redirect,width=1920,height=1920,fit=scale-down/https://www.hyundai-forums.com/attachments/oil-tsb-jpg.441900/

 

[Propflux01]

https://www.hyundai-forums.com/cdn-cgi/image/format=auto,onerror=redirect,width=1920,height=1920,fit=scale-down/https://www.hyundai-forums.com/attachments/oil-tsb-jpg.441900/

Thank you. I wonder why they only specify it for 2013-14 models.

 

[pbm]

[QUOTE="ka9mnx:
Do you really think a vehicle manufacturer is going to deliberately use an oil that will compromise an engines reliability just to satisfy CAFE?

Possibly....after all the manufacturers often recommend 'lifetime' ATF's etc....even though we all know that is "deliberately compromising (longterm) reliability"...

 

[ka9mnx]

Do you really think a vehicle manufacturer is going to deliberately use an oil that will compromise an engines reliability just to satisfy CAFE?
Possibly....after all the manufacturers often recommend 'lifetime' ATF's etc....even though we all know that is "deliberately compromising (longterm) reliability"...

Very true but how many people actually change their ATF?

 

[Hypergalaxy]

Very true but how many people actually change their ATF?

I understand your argument but I think most in this forum do. People whom properly maintain their vehicles at least do it once a blue moon.

 

[ZeeOSix]

Very true but how many people actually change their ATF?

Most "do" when the car gets traded-in for a new one.

 

[Accent Abuser]

Very true but how many people actually change their ATF?

Modern atf is great but people who want to keep their vehicle 500k miles will not get that far on the factory fill. At 126k the factory atf in my transmission was completely black and filled with particulates. OEM power train warranty is 100k/10 years so as far as I'm concerned the fluid is good only that long. My definition of "lifetime" is a lot longer than Hyundai's.

 

[Accent Abuser]

Thank you. I wonder why they only specify it for 2013-14 models.

I think the early gamma engines had subpar bearings that couldn't handle the turbo.

 

[Ram02]

Enough guys we all know 5w30 protects better than 5w20

 

[4WD]

Very true but how many people actually change their ATF?

I’m surprised there is not a thicker ATF crowd here

 

[Accent Abuser]

I’m surprised there is not a thicker ATF crowd here

Atf has never been a thick oil. Even the very first autos designed by GM used a 20 weight oil. What goes on in a transmission is quite different than an engine.

 

[4WD]

Atf has never been a thick oil. Even the very first autos designed by GM used a 20 weight oil. What goes on in a transmission is quite different than an engine.

I have noticed that for 40 years … BTW, the little yellow face means a pun around here …

 

[SteveG4]

I have noticed that for 40 years … BTW, the little yellow face means a pun around here …

You masked bandit!

 

[JWB]

Only difference outside extreme op conditions (towing and high speed) is a slight more friction resulting is less fuel economy and one would need a lab test to notice the difference.

 

[JohnnyJohnson]

I’m surprised there is not a thicker ATF crowd here

Me I'm shocked there isn't a thinner ATF crowd!

 

[4WD]

Me I'm shocked there isn't a thinner ATF crowd!

It would have to Zippo fluid to be thinner (or has that been banned )?