Premium Starfish Member
Join Date: May 2012
Location: Littleton, CO
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If your running the stock air box - Do the ZooDad mod.
Or upgrade to the 6637 air filter mod - you'll pick up 1 to 2 MPG alone from that (speaking from experience.)
After that - definitely check the EPBS tube/sensor and clean it.
I have not done the hutch/harpoon mods yet - but that's on my to-do list.
But I can say that with new filters, and oil changes and a clean tube - and no tuning - I was able to get 20mpg on the highway at 70mph on my last road trip (not using cruise control either) and I'm about the same tire size as you.
2003 EX, 7.3L 4inch Lift, Nitto Trail Grappler's, KMC XD Spy's
k Miles, Currently 605tq, 312hp
Last edited by AzPatMan; 08-22-2013 at 07:42 AM.