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Oil Change Ready to change the oil in your Dodge Ram? Engine -Trans - Differential - Transfer Case


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  #11  
Old 04-21-2012, 11:37 PM
wbowyer wbowyer is offline
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I know from personal experience that it causes the MDS to function erratically and "harshly"...so much so that the dealership went out of their way to make up for their mistake when I went back.
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  #12  
Old 04-23-2012, 08:44 AM
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Al E. Gator Al E. Gator is offline
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Quote:
Originally Posted by huntergreen View Post
wvcoolvanilla, if your question is for me, i am asking because i was buying some 5-20 oil and was told that since warm weather was coming up i should use a heavier oil. went through the speal about mds and was told that a 5-30 would not affect mds at all. i bought 5-20 anyway.

Warmer weather in NJ won't be warm enough to need heavier oil. If I don't need it GA you defintiely don't need it in NJ.
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  #13  
Old 04-23-2012, 09:04 AM
dkerr24 dkerr24 is offline
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Heck, I ran 5w-20 in my 5.7L all last summer and we had temps of over 100F for over 85 days.

Darin
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  #14  
Old 04-23-2012, 06:14 PM
huntergreen huntergreen is offline
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Quote:
Originally Posted by Al E. Gator View Post
Warmer weather in NJ won't be warm enough to need heavier oil. If I don't need it GA you defintiely don't need it in NJ.
no i am staying with 5-20 wt oil. i have visited parents in tavares florida for a couple weeks at a time in aug only to find out that it was hotter in jersey than down south, and it was dam hot in florida, we have 100 degree weather here on occasion.
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  #15  
Old 04-25-2012, 11:24 AM
SleepyWeasel SleepyWeasel is offline
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Quote:
Originally Posted by wbowyer View Post
I know from personal experience that it causes the MDS to function erratically and "harshly"...so much so that the dealership went out of their way to make up for their mistake when I went back.
I have noticed that happening on mine since the last time we got the oil changed at the dealership. I'm guessing they put the wrong grade oil in it. That was the last time they are changing the oil anyways.

This is probably a dumb question, but in all my other vehicles I run synthetics. Will a synthetic oil effect the MDS at all?
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Last edited by SleepyWeasel; 04-25-2012 at 11:26 AM. Reason: spelling
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  #16  
Old 04-25-2012, 04:49 PM
dkerr24 dkerr24 is offline
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I run Mobil 1 5W-20 in my 5.7L, and the MDS functions as it was designed... which I think it should be redesigned to only function above speeds of 45 mph.

Darin
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Old 04-26-2012, 02:40 PM
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synthetic will work just fine, i would stick wit 5-20 wt.
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Old 04-26-2012, 03:36 PM
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0W-20 & 5W-20 will work fine with our HEMI engines w/ MDS

I once had a check engine light come on & as i was about to have a job driving quite a distance & back, i called the dealership & went right in
They hooked up the StarScan or what ever it was & it read out something like
IRRATIONAL DATA DUE to ....
I was told at my next service that they had changed the oil & everything went back to normal
They were the only ones that had ever opened my hood, i had not cared enough to look under there at that time. Besides me, they were the only people driving it
-------------------------------------------------------------------------------------

The trick to MDS is this electronically operated valve that allows oil pressure to pump up the exhaust lifter, allowing cylinder pressure to bleed off when the cylinder is not being used. The computer deactivates the cylinder's coil pack and injector during MDS operation, which results in a twenty-percent increase in fuel economy. The entire process happens in milliseconds and is seamless.

http://www.moparmusclemagazine.com/t.../photo_09.html


Read more: http://www.moparmusclemagazine.com/t...#ixzz1tB1Qv0Kg
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Old 04-27-2012, 07:59 AM
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I like that part "The entire process happens in milliseconds and is seamless."

For something that is 'seamless', I sure do notice it as the truck has a signficant loss of power when the MDS kicks in. Even more noticeable if the MDS kicks in just as you start up a hill.

Darin
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  #20  
Old 04-27-2012, 02:59 PM
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Just did my first oil change at 3000. Put Royal Purple 5w-20 in along with a RP oil filter. RP is all i have ever run in all my trucks. A little costly but i'll stick with it.
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