Oil Weight Recommendation for 2012 RAM 2500 Hemi

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Two years ago, I ran the gauntlet in the Colorado Springs area, buying up all the Mobil 5000 I could find in both 5w20 and 5w30 for about a dollar a quart. I have used the oil in 3 of our vehicles, but I am finally out of the oil. So, it is time to choose something for my Ram, going forward.

The Hemi 2500 does not have displacement adjusting. It just burns 8 cylinders all the time like a V8 should! hahahaha

My manual calls for 5w30.....while the oil cap calls for 5w20 and the OCI is 7k miles. I have been running Mobil 5000 for 5k intervals, with my next change coming at 35,000 miles.

I know that all of you will recommend 5w30 for 7k miles....as long as the truck is under warrantee. My real question is this.....at some point in the future, what do you think about Mobil 1 0w40 for 10k mile OCI's? The wife drives a Benz and we pour in Mobil 1 0w40 and it would be convenience to keep one oil in the garage. I understand that Mobil 1 0w40 is really a very light 40wt....nearly a 30wt and wouldn't be that different than pouring in a heavy 5w30 into the engine.


1. What kind of vehicle you have - 2012 DODGE RAM 2500 CREW CAB 5.7L HEMI 4x4


2. What your owner's manual says -- 5w30, but the fill cap says 5w20.


3. Where you live - Colorado

4. How you drive (easy? hard? fast? slow?)- I normally drive to maximize fuel economy...so like Grandpa. But at times, I turn the ponies loose and I town a 5,000 lb trailer about 6 times a year.


5. What your daily drive is like (short trips? long trips? city? highway?) - I work out of a home office, so the truck isn't driven daily and since I also ride motorcycles, the truck sometimes sits for 3-5 days without being driven. Upon its 2 year anniversary, the truck will have 35,000 miles.


6. Whether your car has any known problems - None
 
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I believe those trucks say to use 5w-20 if you are not towing a heavy load and 5w30 if you plan on towing a heavy load.

What is your warranty status? 0w-40 certainly wouldn't hurt anything (but is a bit on the heavier side) but the warranty would not be happy
 
Originally Posted By: LargeCarManX2
I think Mobil 1 Ow40 weight and a Fram Ultra or Napa Platinum for 10K would be the ticket.



Good point about a premium oil filter to go 10k miles....

I am a believer in the Purolator Pure One.


Originally Posted By: Miller88
I believe those trucks say to use 5w-20 if you are not towing a heavy load and 5w30 if you plan on towing a heavy load.

What is your warranty status? 0w-40 certainly wouldn't hurt anything (but is a bit on the heavier side) but the warranty would not be happy



Yes, you are correct about the towing statement.

And yes, this is a question for down the road, as I will not compromised the warrantee.
.......
 
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Originally Posted By: Miller88
I believe those trucks say to use 5w-20 if you are not towing a heavy load and 5w30 if you plan on towing a heavy load.

What is your warranty status? 0w-40 certainly wouldn't hurt anything (but is a bit on the heavier side) but the warranty would not be happy


I wonder, and am sure somebody has the numbers side by side showing 5w30 and 0w40 as the oil analyzers see them...i.e. from a oil analysis papers point of view?
 
Originally Posted By: BigJohn
Originally Posted By: LargeCarManX2
I believe that Purolator now has a synthetic equal to Ultra and Platinum as well.


I am going to derail my own thread.....

Why is it necessary to have an oil filter that is specific to synthetic oils?



......


It isn't.

Synthetic media filters flow better. But they certainly aren't necessary.
 
Originally Posted By: OVERKILL
Originally Posted By: BigJohn
Originally Posted By: LargeCarManX2
I believe that Purolator now has a synthetic equal to Ultra and Platinum as well.


I am going to derail my own thread.....

Why is it necessary to have an oil filter that is specific to synthetic oils?



......


It isn't.

Synthetic media filters flow better. But they certainly aren't necessary.


This may be moot statement by now, but.....I understand that synthetic filters or those filters that are made for synthetics have a better chance of the synthetic oils not eating the glue away in a paper type filter? I believe synthetic filters work better for the long haul...i.e. 10 to 15K OCI's.
 
Originally Posted By: LargeCarManX2
I wonder, and am sure somebody has the numbers side by side showing 5w30 and 0w40 as the oil analyzers see them...i.e. from a oil analysis papers point of view?

Particularly if it's a virgin sample, a tech should be able to easily tell the difference between the two. Heck, plenty of members here will be able to tell the difference between the two on a virgin sample, and I'm not even talking about our resident experts. Viscosity will obviously be different. Phosphorous numbers will be a bit different. TBN will also differ a bit, with A1/B1 A5/B5 having a different minimum than A3/B3 A3/B4.
 
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