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3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
My 2500 08 has a recommendation of 5w20. Its written on the oil cap and in the damn booklet!!!
I don't like 5w20, I think its too thin, and not that great for our winter conditions. That's one reason why i'll never buy a hemi with MDS...