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  #1  
Old 08-14-2012, 05:15 PM
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Default Engine oil grade: 5W20 or 5W30 ?

RAM 1500 5.7 Hemi engine service manual says use only 5W20 oil otherwise the MDS could not work properly.
However, the same engine is used in the 2500 and 3500 where the service manual says use 5w30 ???
I'm living in France and I have a hard time to find 5W20 oil. There are currently almost no car engines using this oil grade, even in Europe.
Question: can I use 5W30 oil that is easy to find for me for my RAM 1500 5.7 Hemi engine?
Has anyone experience, good or bad, with this?
Thanks for your answers! Denis.
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Old 08-14-2012, 05:25 PM
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The 2500s don't have MDS.....Run 5W-20 or 0W-20 only!
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Old 08-14-2012, 05:33 PM
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Quote:
Originally Posted by 916Timmy View Post
The 2500s don't have MDS.....Run 5W-20 or 0W-20 only!
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Old 08-14-2012, 07:52 PM
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Denis Did you buy from Chrysler dealer as they should have 5w-20 just to service the trucks they sell. Someone can correct me here, I am not sure what kind of driving you are doing and what terrain you live in? The 5w-20 is required to allow the MDS system function efficiently and a heavier oil will effect that.If you do not require the MDS just engaging 5th will disengage the MDS then I don't think the heavier oil will do any harm.I live on the N Cal coast where the terrain has a lot of bends as well as being hilly. The last couple of times I have driving inland {these trips vary from 100 to 150 miles one way} I have experimented just driving in 5th this allows all the other gears to function I have seen very little difference in the MPG though when in MDS mode it engages and disengages frequently.
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Old 08-15-2012, 01:15 PM
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I'm living in France and the truck has been imported. There is no Chrysler dealer where I can go!!!
5W30 is common oil grade here in Europe but 5W20 is not and is very very expensive.
So I was wondering if anybody has experience using 5W30 with MDS engaged and what is the result. If no positive feedback I'll have to try to find the requested oil. Thanks for your help.
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Old 08-16-2012, 12:06 PM
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If you search the sight for "Rootbear" there was a phone in a couple of years back with Chrysler engineers they discussed how to turn the MDS off, also the importance of using W5-20 for the MDS system. over time some here have used the heavier oil and that has not proved satisfactory.So the bottom line is if you want to run the MDS you will have to find W5-20 regular or synthetic. With synthetic you can push it to maybe to 6000 miles between changes.
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Old 08-17-2012, 11:02 AM
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i would order a few oil changes worth and buy in bulk o n line. it will be cheaper than voiding your warranty.
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Old 08-19-2012, 12:57 AM
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i use 5-30 except for the summer season and i use 10-30 and change every 3K miles. i had exchanged emails last july b4 i bought and this is what a chrysler engineer told me, take it for what its worth>

The new models have an oil change indicator that will give change intervals. The ECU arrives at this mileage based on several inputs, miles, engine usage history, etc. Depending on how the vehicle is used, Ive seen them wait for up to 8,000 miles before calling for an oil change. You can decide for yourself, but I would be a little more frequent then that. Also, I believe the new models call for 5W20 or 5W30 oil. Id use something a little heavier in the 5.7, like 10W30.

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Old 08-19-2012, 01:26 AM
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He's correct. Travel the world and you'll see 5W 30 pretty much rules and anything else is not only expensive but very difficult to find.... in particular in Europe.

Using 5W 30 grade will NOT harm anything.

Ask a Chrysler service tech/manager and he'll whistle the same tune.

Go ahead; you'll be fine.
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Old 08-19-2012, 07:47 AM
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Admittitly, I am not familiar with oil viscosity availability and 5w20 costs in Europe, but considering that over the 8k factory recommended change interval, I've have to guess that there exists little impact on routine maintainance costs. I have to place my trust in factory enginering recommendations for long term reliability and mpg. I use only dealer service and full synthetic lubrication products.
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