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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 0w only refers to pour at lower temperatures. Both 5w20 and 0w20 should have the same viscosity at operating temperatures. From what I have read on "Bob is the Oil Guy", the 0w is a superior oil due toa betteradditive package. I am running it with 10k mile oil change intervals...
I changed my oil to Mobil 1 0W-20 weight, and noticed a .6-.8 mpg increase on average over the last few tanks of gas. I used the Mobil 1 filter, as well... Haven't quite decided on a drain interval yet. Any recommendations?