Synthetic or Comventional?

[dieselshadow]

$10 Delivery makes is 31.99 for one and about $76 or $27/gal for 3 assuming it isn't $10/gallon shipping. Decent price but not $22/gal.

They sell it in the store for the same price....$22/gallon. Wife bought it for me on the last oil change as I refuse to go to WM. LOL

 

[lpennock]

They sell it in the store for the same price....$22/gallon. Wife bought it for me on the last oil change as I refuse to go to WM. LOL

Cool. The posted add said it wasn't available for store pickup.

 

[BarryG]

I also have bought it in Walmart off the shelf. It is not always there but when I start getting close to oil change time within a few k miles when I am in I look for it. I have been able to get it but not always on the first try. Not that I have searched everywhere for it but Walmart is the only place locally that I have ever found it on the shelf.

 

[Learjet]

order from Walmart and have it delivered...pretty simple...same price as in store...or at least it was on my last purchase.

 

[gsbrockman]

Redline is Ester and PAO.

Wasn’t Ester Fred’s sister-in-law on “Sanford and Son”?

 

[TFucili]

Wasn’t Ester Fred’s sister-in-law on “Sanford and Son”?

LOL, yes, sir!

 

[Newsa]

 

[Rob S]

But 10w-30 is. Makes me wonder if it’s emissions/economy based or if the redesigned motor really doesn’t need a 40wt.

The low temp recommendation is still 5w-40 thou.

On my 2019 went with the T6 5w-40 instead of the 10w-30 blended.

 

[pwr2tow]

But 10w-30 is. Makes me wonder if it’s emissions/economy based or if the redesigned motor really doesn’t need a 40wt.

The low temp recommendation is still 5w-40 thou.

My pure speculation with a smidgeon of mechanical knowledge is because of the faster pump up of the hydraulic lifters. Which would also play into the 5w for cold weather startups.

What's not speculation is a 15w40 or 5w40 is not as robust as a 10w30 and will shear down to 30w. The more polymers in an oil the less robust to stay in weight.

Somewhere around 2000-2004 and newer cummins engines did just fine on 10w30. International/navistar not so much.

The 40w since around 2004 in my opinion is still just a left over from years past when the only widely available diesel engine oil was 40w.

 

[JR]

I'd wager a big part of why the ISB specd 15w40 for so long was due to the lube boundary requirements of the flat tappets. Alot of their larger engines have been running 10w30 for around a decade now, I'd not be concerned about running it if they recommend it.

For those with a 19, is the 10w30 recommended in as high of ambient temps as the 5w40?

 

[Cummins12V98]

This is the only oil AMZ/OIL lists for a 2020 RAM. I couldn't find the PDF. My cost is $32.35 per gallon.

 

[TFucili]

10W30 is what is called out on the fill cap, and both grades are acceptable at higher temps, with 5W40 required at low temps, with a dire warning of engine damage if 5W40 synthetic is not used below 0'F.

 

[AH64ID]

My pure speculation with a smidgeon of mechanical knowledge is because of the faster pump up of the hydraulic lifters. Which would also play into the 5w for cold weather startups.

What's not speculation is a 15w40 or 5w40 is not as robust as a 10w30 and will shear down to 30w. The more polymers in an oil the less robust to stay in weight.

Somewhere around 2000-2004 and newer cummins engines did just fine on 10w30. International/navistar not so much.

The 40w since around 2004 in my opinion is still just a left over from years past when the only widely available diesel engine oil was 40w.

For a very short period I ran a 5w-30 in my 05, one that met the Cummins requirements for a 30wt in a ISB, and it did not like it. UOA was the worst I had on that motor.. back to 15w-40 synthetic for me.

My UOA shows FAR better results with 15w-40 than 5w-30. Amsoil AME gave me great UOA.

Right before selling my 05 I switched from Amsoil AME to DME and it ran slightly higher pressure with slightly lower temperate under the same load/conditions. Needless to say I have no issues or qualms running it in my 18.

The new motors may not need it, as I think the 40w was used for the flat tappets and nothing else. Time will tell I guess.

 

[pwr2tow]

For a very short period I ran a 5w-30 in my 05, one that met the Cummins requirements for a 30wt in a ISB, and it did not like it. UOA was the worst I had on that motor.. back to 15w-40 synthetic for me.

My UOA shows FAR better results with 15w-40 than 5w-30. Amsoil AME gave me great UOA.

Right before selling my 05 I switched from Amsoil AME to DME and it ran slightly higher pressure with slightly lower temperate under the same load/conditions. Needless to say I have no issues or qualms running it in my 18.

The new motors may not need it, as I think the 40w was used for the flat tappets and nothing else. Time will tell I guess.

That 5w30 probably sheared to a 20w for the same reason the 5w40 and 15w40 shear to a 30w, increased polymers equals more shear. 10w30 is more stable and stay in grade better.

 

[pwr2tow]

This is the only oil AMZ/OIL lists for a 2020 RAM. I couldn't find the PDF. My cost is $32.35 per gallon.

View attachment 119876

Holy snapping arseholes batman, one gallon cost more than my whole oil change!!!

 

[Cummins12V98]

Holy snapping arseholes batman, one gallon cost more than my whole oil change!!!

My Wendy’s burger is much more than McDonalds.

$33 for your oil and filter or just oil?

 

[pwr2tow]

My Wendy’s burger is much more than McDonalds.

$33 for your oil and filter or just oil?

Hahahahaha, I'm sure you can read and add?

Metaphor comes to mind!!!

4 for 4 at Wendy's

 

[AH64ID]

That 5w30 probably sheared to a 20w for the same reason the 5w40 and 15w40 shear to a 30w, increased polymers equals more shear. 10w30 is more stable and stay in grade better.

It doesn’t really matter what it shears to as long as it meets the HTHS criteria set forth by Cummins, that’s what is commonly confused with “shearing to a different grade”.

The min HTHS for a 30wt on a ISB is 3.5. The oil I ran had a HTHS of 3.5, so it met min. It also was thicker in the 30wt category than other does oils. I just didn’t like the UOA.

The oil I currently run has a HTHS of 4.5 and will stay “in grade” very well. The HTHS test is also done at around 300°F from what I recall and the highest temp I saw on my 05 was around 235°.

I can tell you that Delo 15w-40 looses a lot more pressure at normal operating temps compared to Amsoil 15w-40 AME or DME. So which one do you think stays “in grade”
better.

 

[pwr2tow]

It doesn’t really matter what it shears to as long as it meets the HTHS criteria set forth by Cummins, that’s what is commonly confused with “shearing to a different grade”.

The min HTHS for a 30wt on a ISB is 3.5. The oil I ran had a HTHS of 3.5, so it met min. It also was thicker in the 30wt category than other does oils. I just didn’t like the UOA.

The oil I currently run has a HTHS of 4.5 and will stay “in grade” very well. The HTHS test is also done at around 300°F from what I recall and the highest temp I saw on my 05 was around 235°.

I can tell you that Delo 15w-40 looses a lot more pressure at normal operating temps compared to Amsoil 15w-40 AME or DME. So which one do you think stays “in grade”
better.

You are wrong it does matters what the oil shears to. Meeting pre shear specs and the oil shears too much shows it's junk oil. Yes oils are suppose to stay within a certain range, a 30 shearing into 20 is not acceptable while a 40 shearing into 30 is. Although a 30 can shear into a 20 which could be acceptable while a 40 shearing into a low 30 is acceptable.

Your question above, Which one stays in grade you ask?
Both!!!

 

[AH64ID]

You are wrong it does matters what the oil shears to. Meeting pre shear specs and the oil shears too much shows it's junk oil. Yes oils are suppose to stay within a certain range, a 30 shearing into 20 is not acceptable while a 40 shearing into 30 is. Although a 30 can shear into a 20 which could be acceptable while a 40 shearing into a low 30 is acceptable.

Your question above, Which one stays in grade you ask?
Both!!!

You are missing what I am saying, unless you think Cummins takes none of that into account when they spec an oil...

Going above and beyond spec is preference, not requirement. It's why I prefer to run an oil with better properties at cold and hot temps, and not even that hot just the upper end of normal.