5w 20 or 5w30

[WaRam2012]

I have just put a new engine in my 2012 Ram 5.7 I live in the North West and I have been debating on going to 5w 30 on my first oil change I have always ran Amsoil in my other vehicles I’m sure this oil debate has been ran to death but just would like some input
Thanks in advance

 

[DILLIGAF]

RL 5w30
RP Filter

/ end thread

 

[JHoward]

^^^This^^^

Red Line 5w/30 and an Royal Purple oil filter. Some folks are using the FRAM Ultra XG2 as a back up oil filter.

 

[WaRam2012]

Thanks for responding

 

[1979PowerWagon360]

I know this is a controversial topic; my response to this question is always "the manufacturer's recommendation". Personally, I don't ever think it's a good idea to try and outsmart the engineers who designed an engine.

 

[ramffml]

Always run 0/5w-30 in a hemi. You get far better protection. 20 weight is for CAFE reasons only.

The "engineers know best" comments you'll inevitably get are wrong because they assume engineers get the final say.

Redline 5w-30 is a great candidate, as is Mobil 1 FS 0w-40 with LG, and HP oil looks incredible as well.

Amsoil has been reported to make hemis clatter/noisy. I wouldn't run it.

 

[Wild one]

I know this is a controversial topic; my response to this question is always "the manufacturer's recommendation". Personally, I don't ever think it's a good idea to try and outsmart the engineers who designed an engine.

The note at the bottom might interest you.

 

[1979PowerWagon360]

The note at the bottom might interest you.

That is part of the recommendations that I advise to follow. It's approved by manufacturer.

 

[1979PowerWagon360]

Always run 0/5w-30 in a hemi. You get far better protection. 20 weight is for CAFE reasons only.

The "engineers know best" comments you'll inevitably get are wrong because they assume engineers get the final say.

Redline 5w-30 is a great candidate, as is Mobil 1 FS 0w-40 with LG, and HP oil looks incredible as well.

Amsoil has been reported to make hemis clatter/noisy. I wouldn't run it.

I respectfully disagree that the engineers recommendation is for CAFE only. I'm basing my opinion on an entire fleet of cars over a long period. Again, I respect your opinion but don't share it.

 

[Burla]

I have just put a new engine in my 2012 Ram 5.7 I live in the North West and I have been debating on going to 5w 30 on my first oil change I have always ran Amsoil in my other vehicles I’m sure this oil debate has been ran to death but just would like some input
Thanks in advance

Since you brought up amsoil, look at their sheets. 5w30 operates at 10.3 visc, 5w20 operates at 8.8 visc, now look at the next weight up which is 0w40 that operates at viscosity 14.8. The point is 5w20 and 5w30 are thin oils not much difference either way, the 5w30 will give you a little more film strength. You can see when you jump to 40 weight you have a real heavy duty oil, whereas 5w30/5w20 are just your basic passenger vehicle oil. For a 2012 no doubt you want to be thicker, as tolerances widen you don't want thin oil. If you get a used oil analysis sometime, post it in blackstone thread in 4 gen performance section for feedback on what your engine is doing.

EPA uses CAFE standards to force manu's to use thin oils. Since CAFE is impossible to make the goals of, manu's need to prove they tried everything. It has been posted ad naseum. FCA engineers made hemi specific oil 0w40 for a reason, but they literally cant use that oil in a 1500 non HD vejicle.




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