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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.
I use one on 93 octane setting using 93 octane. Runs much better and gets better mileage even with the MDS turned off. Just restore the stock tune before going to the dealer for anything.
My Ram broke down at a Home Depot. Could not get it restarted to reset org tune. Its at dealership with transmission problem. I have my fingers crossed.