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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.
The factory recommends 5w30 for your year ram. I personally recommend mobil 1. I recall hearing that the amount needed in earlier gen3 rams is 6-6.5 quarts, the newer ones are the ones that require 7.