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Oil Thread - 6.4 Hemi

RKCRLR said:
I'll probably use Pennzoil Ultra Platinum 0W-40 for my oil changes unless other oils come out that meet the recommendations in the owner's manual, at least until my warranty is up.
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That is what I use. I only have 1 oil change under my belt as I only have about 4K miles in my '24 Power Wagon. NAPA will occasionally have good deals on Pennzoil Ultra Platinum. This month is an example. Check the monthly NAPA flyer.
 
RKCRLR said:
It is unclear to me what the statement "Equivalent full synthetic SAE 0W-40 engine oil can be used but must have the API Donut trademark".
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It means they only want you to buy Pennzoil or MOPAR oil...
No AMSOIL, Redline, etc....
 
Gondul said:
It means they only want you to buy Pennzoil or MOPAR oil...
No AMSOIL, Redline, etc....
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It seems a majority of people interpret the statement as Ram would prefer you to use oil per MS-A0921 but it is acceptable to use any full synthetic 0W-40 oil that has the API donut trademark. But it could also be interpreted that a full synthetic 0W-40 oil equivalent to MS-A0921 can be used as long as it has the API donut trademark. Some oil manufacturers will claim to meet or exceed the requirements of an automotive manufacturer's proprietary specification without paying the costs to have it certified.

Does anyone know if any API SP 0W-40 full synthetic oil would also meet the requirements of MS-A0921? Or is MS-A0921 an enhanced version of a API SP 0W-40 full synthetic oil?
 
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RKCRLR said:
Here is what my 2024 owner's manual says for the Hemi oil:
"We recommend using Mopar® API Certified SAE 0W-40 Full Synthetic Engine Oil
which meets the requirements of the manufacturer Material Standard MS-A0921.
Equivalent full synthetic SAE 0W-40 engine oil can be used but must have the API
Donut trademark"

The only oils I've found that are certified to MS-A0921 are Pennzoil Ultra Platinum and Mopar 0W-40. There are boutique oils (AMSOIL, Redline, etc.) that claim to meet the requirements of MS-A0921 but don't have the API Donut trademark.

It is unclear to me what the statement "Equivalent full synthetic SAE 0W-40 engine oil can be used but must have the API Donut trademark". Does that mean the oil has to be equivalent to MS-A0921? There are a lot of API donut trademarks for gasoline engines but not all are acceptable for use in a modern Hemi. From my research you at least need an API SN+ or SP oil. My understanding is MS-A0921 is basically an API SP oil with specific additives and tighter limits on certain characteristics that FCA deemed important for their engines.

I'll probably use Pennzoil Ultra Platinum 0W-40 for my oil changes unless other oils come out that meet the recommendations in the owner's manual, at least until my warranty is up.
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Yeah all i used was PUP and Mopar filters on my 1500 HEMI... worked out for the time i had it so just going to continue to do the same thing with the 2500.
 
So Castrol's website states their Castrol EDGE Euro 0W-40 A3/B4 is:
"Suitable for use in the following specifications: MB 229.3, Chrysler MS-12633 / MS-A0921"
www.castrol.com

Castrol® EDGE Euro Car formula | Castrol® USA

Castrol® EDGE® Euro Car is a range of advanced full synthetic motor oils engineered to exceed manufacturer test limits, ensuring the highest level of protection and maximum performance for European cars.
www.castrol.com www.castrol.com

And their data sheet states:
"Warranted by Castrol to be completely suitable for use in vehicles where the following specifications apply: MB 229.3,
Chrysler MS-12633 / MS-A0921"

To me that means it meets the MS-A0291 specification but they didn't pay to have it certified. But I guess it could also mean that it is close enough that Castrol determined it wouldn't be a problem...
 
I was a big Amsoil and Mobile 1 guy forever. For 150k miles on my 5.7 1500 I have used the recommended PUP with the "oversized" filter and the truck ran like the day I drove it off the lot after lots of towing, hauling and wheeling. I too am from the penzoil not being good generation sorta, but my experience over the last decade with a hemi using it primarily has changed my mind.

For my 6.4 I plan on continuing using the recommended oil (PUP 0w40) and the SRT oversized oil filter until I find an equal or better filter for cheaper.
 
I would like to hear Ram's reasoning for 0W40 versus 5W40 or similar. It's widely known that the greater the spread between numbers the faster the oil shears down and falls out of grade. Also, "thicker" viscosity oils have shown to leave a better film on cams and lifters overnight which means less clatter, noise, and wear on cold starts. Unless a guy lives in Siberia I just don't understand a 0W40 spec, especially on a pickup truck. It's not like a 5W won't flow well in winter.
 
WXman said:
I would like to hear Ram's reasoning for 0W40 versus 5W40 or similar. It's widely known that the greater the spread between numbers the faster the oil shears down and falls out of grade. Also, "thicker" viscosity oils have shown to leave a better film on cams and lifters overnight which means less clatter, noise, and wear on cold starts. Unless a guy lives in Siberia I just don't understand a 0W40 spec, especially on a pickup truck. It's not like a 5W won't flow well in winter.
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5w40 and 0w40 are very close. The recommended will be better in winter or cold startups, but essentially when the engine is working will be the same. The only pro I see with 0w40 over 5w40 is for those who dont let their engine "warm" up and just drive right away. Other then that I see no real difference. Maybe with tighter tolerances the thinnner cold viscosity is beneficial.

Either way the one thing I trust with engineers is fluids. For now. So for me 0w40 PUP. My HEMI starts up quiet on cold mornings so no complaints here.
 
mdsonofthesouth said:
5w40 and 0w40 are very close. The recommended will be better in winter or cold startups, but essentially when the engine is working will be the same. The only pro I see with 0w40 over 5w40 is for those who dont let their engine "warm" up and just drive right away. Other then that I see no real difference. Maybe with tighter tolerances the thinnner cold viscosity is beneficial.

Either way the one thing I trust with engineers is fluids. For now. So for me 0w40 PUP. My HEMI starts up quiet on cold mornings so no complaints here.
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Yeah I get that 0W flows better in cold weather, but we've seen 5W flow really well down to just below 0 degrees. And if you start at 0W that means it takes longer to reach operating temp viscosity. A 5W is going to get to operating viscosity faster. And I'm not sure about the tight tolerances. This is a V8 that was designed at the end of the 2000s. So I just don't see the benefit of 0W oil in this application. But, I suppose there are a lot of guys with really high mileage on this 0W40 spec, so...
 
WXman said:
Yeah I get that 0W flows better in cold weather, but we've seen 5W flow really well down to just below 0 degrees. And if you start at 0W that means it takes longer to reach operating temp viscosity. A 5W is going to get to operating viscosity faster. And I'm not sure about the tight tolerances. This is a V8 that was designed at the end of the 2000s. So I just don't see the benefit of 0W oil in this application. But, I suppose there are a lot of guys with really high mileage on this 0W40 spec, so...
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You’re over thinking it. Just put 0-40 pup in it
 
WXman said:
Yeah I get that 0W flows better in cold weather, but we've seen 5W flow really well down to just below 0 degrees. And if you start at 0W that means it takes longer to reach operating temp viscosity. A 5W is going to get to operating viscosity faster. And I'm not sure about the tight tolerances. This is a V8 that was designed at the end of the 2000s. So I just don't see the benefit of 0W oil in this application. But, I suppose there are a lot of guys with really high mileage on this 0W40 spec, so...
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While they started with 5w20 (I think) back in 2014 for the 392 BGE, I can only summize that they have found that 0w40 works better for longevity in these engines. My old 2016 5.7 in my 1500 used 5w20 and ran like new after ALOT of HARD miles.
 
WXman said:
Yeah I get that 0W flows better in cold weather, but we've seen 5W flow really well down to just below 0 degrees. And if you start at 0W that means it takes longer to reach operating temp viscosity. A 5W is going to get to operating viscosity faster. And I'm not sure about the tight tolerances. This is a V8 that was designed at the end of the 2000s. So I just don't see the benefit of 0W oil in this application. But, I suppose there are a lot of guys with really high mileage on this 0W40 spec, so...
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0 gets to the top end quicker on a cold start, top end is where the issue is.
 
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