Oil weight

[Waterboy]

I have a 2020 2500 Ram. Owned it two years. I have ran T6 5w-40 since I bought it. Living in the south with temps over 100. Moved too IL. Now being told 5w-40 is to thick and should be running 10w-30. Which is the best weight to run year round?

 

[CrispyBacon]

0w20,for me.

 

[Daw14]

I have a 2020 2500 Ram. Owned it two years. I have ran T6 5w-40 since I bought it. Living in the south with temps over 100. Moved too IL. Now being told 5w-40 is to thick and should be running 10w-30. Which is the best weight to run year round?

Follow your owners manual .

 

[Travelin Ram]

I have a 2020 2500 Ram. Owned it two years. I have ran T6 5w-40 since I bought it. Living in the south with temps over 100. Moved too IL. Now being told 5w-40 is to thick and should be running 10w-30. Which is the best weight to run year round?

Told by whom? Clearly someone who does not understand oil viscosity ratings.

5W is thinner than 10W for cold starts.
The operating temperature warmed up is the same regardless of where you’re driving.

 

[06 Dodge]

I have a 2020 2500 Ram. Owned it two years. I have ran T6 5w-40 since I bought it. Living in the south with temps over 100. Moved too IL. Now being told 5w-40 is to thick and should be running 10w-30. Which is the best weight to run year round?

Who ever told you that is an idiot 5w is thinner then 10w that first number is what counts in the winter not the second number... Their is a chart that shows what oil to use at what temps, but right now I can't find it to post

 

[jejb]

Who ever told you that is an idiot 5w is thinner then 10w that first number is what counts in the winter not the second number... Their is a chart that shows what oil to use at what temps, but right now I can't find it to post

This. And synthetics tend to have a much better low temp pour point than non-synthetics. I'd stay with the T6 5W-40, personally.

 

[Fatbob Frank]

Full Synth 0W30 is what mine runs I believe...

 

[Tulecreeper]

Mine calls for 0w-40, so that's what it gets. There isn't even a mention of another weight.

 

[Waterboy]

I was told that info at the dealer, when I took it in to fix the trans recall. The owners manual calls for 10w-30 with temps down to zero then it calls for 5w-40 for temps below zero. I will stick with 5w-40. Sure do miss my 2013 2500.

 

[Daw14]

Follow the owners manual, if you inquire at six different shops you will get four different responses. Follow the manual.

 

[Travelin Ram]

Most respondents have gas trucks and the OP has a diesel. And I’m guessing most have no idea because they’re on phones, and the forum software doesn’t show profiles info, or signatures, on the small screen (unless you turn it sideways).

Do yourselves a favor and include all the relevant information in posts asking questions. I see this all the time where gas/diesel, LD vs HD, and truck generations are mixed up.

It will avoid a lot of confusion and erroneous assumptions.

PS the only reason it’s apparent to me is because on an iPad I see all the profiles and sigs; makes it more apparent when the apples and oranges are mixup.

 

[Jon1704]

If your ru

I have a 2020 2500 Ram. Owned it two years. I have ran T6 5w-40 since I bought it. Living in the south with temps over 100. Moved too IL. Now being told 5w-40 is to thick and should be running 10w-30. Which is the best weight to run year round?

nning the 6.4l gas it 0w-40 year round. If you have the Cummings 5w-40 for winter 10am below I believe and 10w-30 for hot summer months.

 

[06 Dodge]

If your ru

nning the 6.4l gas it 0w-40 year round. If you have the Cummings 5w-40 for winter 10am below I believe and 10w-30 for hot summer months.

I have run 5w-40 from -30 below zero to 105 in the summer without problems or receiving a bad UOA's, no need to run two different oils when one good synthetic oil will work all year round

 

[jejb]

From my 22 2500 CTD owners manual. But I agree with 06 Dodge, and just run the 5w-40 year round.

 

[David James]

I have a 2020 2500 Ram. Owned it two years. I have ran T6 5w-40 since I bought it. Living in the south with temps over 100. Moved too IL. Now being told 5w-40 is to thick and should be running 10w-30. Which is the best weight to run year round?

Unless you're the designer and an engineer, how about sticking with the OEM recommendation? You don't need to fake it and try to home brew based on some interweb based hearsay. Buy whatever full syn is on sale, within spec, and get a quality filter. You are welcome.

 

[Tulecreeper]

Unless you're the designer and an engineer, how about sticking with the OEM recommendation? You don't need to fake it and try to home brew based on some interweb based hearsay. Buy whatever full syn is on sale, within spec, and get a quality filter. You are welcome.

Yep, my manual says 0w-40...period. It doesn't even suggest another weight or viscosity dependent on temperature or use. So, for all the years I will own this truck - and I hope it's a bunch - it will be 0w-40 no matter where I choose to live.

 

[David James]

Yep, my manual says 0w-40...period. It doesn't even suggest another weight or viscosity dependent on temperature or use. So, for all the years I will own this truck - and I hope it's a bunch - it will be 0w-40 no matter where I choose to live.

You’ll be happy and so will the 6.4 V8

 

[HEMIMANN]

I don't run 0W-40......too much shear in summer heat and towing loads. You can see that in UOA's in viscosity reduction vs. VOA.

I run 5W-30 in summer. Remember, the 40 wt came from the 6.4 in the hot rod car first. Hemi only needs a 40 wt under high temp and load. 30 wt fine otherwise. 20 wt is EPA saving gas at the expense of faster engine wear.

Since Hemi is marginally oiled, I use a 0W-30 in winter up here in MN.

 

[KKBB]

Yep, my manual says 0w-40...period. It doesn't even suggest another weight or viscosity dependent on temperature or use. So, for all the years I will own this truck - and I hope it's a bunch - it will be 0w-40 no matter where I choose to live.

Use what you want. I used 0W-40 until 2 changes ago when I went to redline 5w-30. I changed it a week ago with just under 5000 miles and it was the dirtiest oil I have drained from my 6.4...and to me that is good. It has a lot of detergents and it cleaned a lot of crap the PUP OW-40 left behind. I did switch back to the PUP OW-40 a week ago...mainly because I have a decent amount left over...and added lubeguard to it. As was stated by HEMIMANN above. The 0W-40 sheers down quick to a lighter viscosity than the redline 5w-30 in roughly 1000 miles. I have done Blackstone labs reports that showed this. All my oil changes have been at roughly 5000 miles. I change every 6 months...spring and fall just to make it easier for me. I don't have a problem with the PUP 0W-40, but I believe the redline 5w-30 is better. I don't care about cost, I want what is best for the hemi that is prone to lifter/cam failure.

 

[crash68]

Unless you're the designer and an engineer, how about sticking with the OEM recommendation? You don't need to fake it and try to home brew based on some interweb based hearsay. Buy whatever full syn is on sale, within spec, and get a quality filter. You are welcome.

You do realize that both 5W-40 and 10W-30 are recommended weights for the 6.7 engine depending on the ambient temperature range. What doesn't make sense is the fact that it's the 5W-40 recommended for colder weather which is what the OP has moved into vs the hotter weather of the south.