Do I need 50w oil?

[engineermike]

I love how Ford carefully worded the manual. I could see how it could be interpretted two ways:

"SAE 5W-20 oil provides optimum fuel economy and durability performance meeting all requirements for your vehicle's engine"

In other words, you could break it up into parts and it would read like this:

"SAE 5W-20 oil provides optimum fuel economy"
"SAE 5W-20 oil provides durability performance meeting all requirements for your vehicle's engine"

The second clause might lead to you wonder, what were these "requirements"? "Optimum" means it's maximized, but for durability is just "meets requirements". Is the requirement that the engine lasts 150k miles while driving gently? I don't know.

Add one comma and it changes the meaning: "SAE 5W-20 oil provides optimum fuel economy and durability performance, meeting all requirements for your vehicle's engine". If this is what it said then there would be a stronger argument for the 20. So did Ford word it that way to intentionally fool the drive-by reader into thinking 20 gets optimum durability?

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[EFI]

The second clause might lead to you wonder, what were these "requirements"?

5yrs / 60,000 miles

That's the "requirement" plain and simple. After that, Ford don't give a rat's behind what happens to your engine.

 

[Ptrug]

Good talk. Based on what I have learned here today, I'll be going with 0W-50 exclusively from now on. Did I do good?

https://www.streetunit.com/Eneos_0W50_p/en-0w50c.htm

https://www.napaonline.com/en/p/AIC3902300

Your welcome

 

[K4fxd]

That's the "requirement" plain and simple. After that, Ford don't give a rat's behind what happens to your engine.

My son designs engines over at Cummins. He designs and tests to some number of hours. He told me once what it is but I forgot, it is equal to the number of miles for warranty. Once the item he designs lasts that long he stops the test. He and Cummins don't care if it lasts another hour, blows to bits right now, or lasts 20 more years.

An interesting side note is after he designs it it goes to another engineering team and their job is to make it cheaper.

I do have it first hand that oil is speced for MPG and emissions. Wear protection is 5th or 6th on the list.

 

[shogun32]

An interesting side note is after he designs it it goes to another engineering team and their job is to make it cheaper.

but do they re-test?

 

[shogun32]

do have it first hand that oil is speced for MPG and emissions. Wear protection is 5th or 6th on the list.

thank you USG made up regulations and goals. And the financial incentives that pervert science and engineering.

 

[K4fxd]

but do they re-test?

Yes, many times it fails so they stick with the original.

 

[K4fxd]

thank you USG EPA made up regulations and goals.

Fixed it for you.

 

[MAGS1]

thank you USG

We using some good ole sheetrock in the engine design/build process now??

 

[Ptrug]

My son designs engines over at Cummins. He designs and tests to some number of hours. He told me once what it is but I forgot, it is equal to the number of miles for warranty. Once the item he designs lasts that long he stops the test. He and Cummins don't care if it lasts another hour, blows to bits right now, or lasts 20 more years.

An interesting side note is after he designs it it goes to another engineering team and their job is to make it cheaper.

I do have it first hand that oil is speced for MPG and emissions. Wear protection is 5th or 6th on the list.

Crazy! but I get it.

 

[WildHorse]

But, there are conditions where pressure can be indicated without flow. Rare. True. But it can happen.

In a closed system sure. Automotive oiling systems aren't closed. It's open. One big leak.

 

[shogun32]

We using some good ole sheetrock in the engine design/build process now??

would probably be more rigid. Ha. It would hold paint better too!

 

[TonyT930]

G2, 120mm on 93.

I don’t track her and rarely WOT but I def drive her hard.

Should I still put 50w as a precaution? Thinking mobile 1 super car which is 40w. Currently on mobile one 30w.

Thoughts?

Amsoil Signature 5w50

 

[Jose1962]

Amsoil Signature 5w50

That's what I use there signature series with supercharger

 

[FlipC]

Pretty Good Information on The Best Oil!
I have run this in All My Engines! And I have Never had a problem.

MOTOR OIL ENGINEERING TEST DATA | 540 RAT - Tech Facts, NOT Myths (wordpress.com)

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