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Why 0/20 Oil for 2023 5.7

Scram1500

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It will be a sad day when forums are filled with eco-warriors wondering which electrons are best for the battery, solar or wind? It won't have the same depth or acumen that an oil debate would produce.

0w-20 and 5w-20 are the same viscosity when hot, the only difference is that 0w flows better on cold start.
 

Ramit392

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It will be a sad day when forums are filled with eco-warriors wondering which electrons are best for the battery, solar or wind? It won't have the same depth or acumen that an oil debate would produce.

0w-20 and 5w-20 are the same viscosity when hot, the only difference is that 0w flows better on cold start.
Thanks for your thoughts. It must be the for that reason for cold starts better lubrication. I also noticed from 2019 to the 2023 the Compression Ratio changed slightly as well not recommending Plus fuel for the 2023 any more like it did for 2019 as well.
 

Ramit392

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its all about MPG and fuel efficiency my man. Also why the Non-Etorque isnt avaible for that year or the 24's
I really don't think the 23 year would have any thoughts to MPG Improvements since they knew the 5.7 was going away. I don't think 0/20 over 5/20 would provide any better or significant MPG increase as well. The Lower compression on 2023 over the 2019 I had helps with fuel cost since it no longer calls for plus fuel and calls for unleaded regular, but the 2023 equipped with same trim as the 2019 does not get as good as MPG average as the 2019 did by about 1.5 to 2.0 mpg.
 

silver billet

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It will be a sad day when forums are filled with eco-warriors wondering which electrons are best for the battery, solar or wind? It won't have the same depth or acumen that an oil debate would produce.

0w-20 and 5w-20 are the same viscosity when hot, the only difference is that 0w flows better on cold start.

There are other differences. 0w-20 is a bigger range than 5w-20 requiring more VII's which can lead to more shearing, the 5w-20 should stay in grade longer all else being the same. This does depend on the oil formula itself, some oils can be made without any VII's, but the cheaper ones will all use a VII. Somewhat of a concern for guys who tow.

My 2 cents, its pointless running 0w-20 unless you absolutely need that extra 5 degrees on the bottom end for extremely cold starts. Better off running 5w-20 or better yet, 5w-30.
 

Ramit392

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There are other differences. 0w-20 is a bigger range than 5w-20 requiring more VII's which can lead to more shearing, the 5w-20 should stay in grade longer all else being the same. This does depend on the oil formula itself, some oils can be made without any VII's, but the cheaper ones will all use a VII. Somewhat of a concern for guys who tow.

My 2 cents, its pointless running 0w-20 unless you absolutely need that extra 5 degrees on the bottom end for extremely cold starts. Better off running 5w-20 or better yet, 5w-30.
Thanks for the input! Makes good sense for sure. I went ahead and ran the 5/20 just like I have in the last three new 5.7 I had new. I just never felt comfortable with the 0/20 being too thin on start up and not used for most all the life of the 5.7's. I agree with you. I think I will stay with 5/20.
 

BrandonSmith

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I really don't think the 23 year would have any thoughts to MPG Improvements since they knew the 5.7 was going away. I don't think 0/20 over 5/20 would provide any better or significant MPG increase as well. The Lower compression on 2023 over the 2019 I had helps with fuel cost since it no longer calls for plus fuel and calls for unleaded regular, but the 2023 equipped with same trim as the 2019 does not get as good as MPG average as the 2019 did by about 1.5 to 2.0 mpg.

89 octane is still recommended. 87 is acceptable. This has not changed.

2023 manual, p. 372
1695222962698.png

2019 manual, p. 526
1695223203460.png

2017 manual, p. 528
1695223369136.png
 

23RAM

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Tree huggers worried about combined fleet gas consumption. That's all it boils down to.
That doesn't make sense. 0w-20 and 5w-20 both flow the same at normal operating temps. The first number is a "winter" number (hence the w) which only indicates how it flows when it's below 0 outside. In southern warm climates, both would work the same. In northern colder climates, the lower "w" rating works better during start-up.
 

Philth

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That doesn't make sense. 0w-20 and 5w-20 both flow the same at normal operating temps. The first number is a "winter" number (hence the w) which only indicates how it flows when it's below 0 outside. In southern warm climates, both would work the same. In northern colder climates, the lower "w" rating works better during start-up.
But they don't flow the same as cold. Thus the increased gas mileage with 0W-20...however miniscule it is. But it appeases the eco-warriors.
 

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