2025 Ram SO Hurricane

[Rand]

240F oil and 246F coolant temperature I believe, I could be a little off. I was looking into that engine over the winter and there are a few good videos floating around referencing it.

245f oil going up a mountain with a trailer.. and it didnt get low oil pressure until 600rpm idle afterwards.
of course a thicker oil would fix that..
however if you arent beating it up a mountain with a heavy trailer the thicker oil is IMO optional (and I'd run it)
but it is nice to break 20mpg in a full size truck too.. and as long as the oil temps are under 230f 0w20 not likely an issue.
although I'm not familiar with how much these dilute or shear the oil.

I would want at least a regular 30wt (non euro)

at 250f your 40wt is now as thick as a 20wt at 212.

 

[User_19876]

Disregard. Found it online at Walmart

It was about $72 for 15qts onAazon not too long ago.

 

[facility1]

PUP 0w-20 will serve you well, after a bit of break in period the PUP 5w-30 would work fine also in summer months.

 

[demarpaint]

245f oil going up a mountain with a trailer.. and it didnt get low oil pressure until 600rpm idle afterwards.
of course a thicker oil would fix that..
however if you arent beating it up a mountain with a heavy trailer the thicker oil is IMO optional (and I'd run it)
but it is nice to break 20mpg in a full size truck too.. and as long as the oil temps are under 230f 0w20 not likely an issue.
although I'm not familiar with how much these dilute or shear the oil.

I would want at least a regular 30wt (non euro)

at 250f your 40wt is now as thick as a 20wt at 212.

I'd run 0W40 in it, especially with the low idle oil pressure after working the engine hard. As you said thicker oil would fix that, so why not use it all the time? IIRC I noticed my 3.6L Pentastar engine has higher oil pressure just about all of the time from what I saw in that video, even for the brief time I ran the 5W20 factory fill. I'm wondering if at some point they're going to make some improvements to the oiling system and engine design. Who knows they might revisit the oil specs like Ford did some years back with some of their engines bumping up a grade. I think a lot of people tend to push turbo engines a bit harder, I see zero downside in using a thicker oil in them.