Don't forget to select the manufacturer as jeep. And most important, add that 0 that I ate, lol. Sorry for that.

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2005 kj CRD, samco, suncoast tc, provent, Kennedy lift pump, GDE ECO full torque, 2nd gen filter head, 245/70/16 a/t tires, mopar light bar, fumoto oil valve, OEM Skid Plates, ARB Front bumper and HD OME, tru cool LPD47391 40k GVW tranny cooler (stock cooler delete), FF Dynamics e-fan and shroud, rocker arms replaced, HDS2 190F thermostat.

I skimmed through most of the posts on this thread and hopefully this hasn't already been addressed. I too noticed a big drop in fuel mileage about like you. I had recently bought new Toyo M/T's, had a new turbo installed, and the T/B and water pump changed. I thought for sure there was something major going on. To make a long story short, I put on the stock sized winter tires and our mileage went right back up to an "average" on the overhead consul to above 26 mpg and at highway speeds I'm at 30 mpg at 60 mph.

I think my Toyo tires are the same size as the ones you said you recently put on (see my signature). I assumed it wouldn't make that much of a difference but it does. Remember, the ratios are off even if you hand calculate each tank. The overhead consul reads an average of around 20 mpg with the Toyo M/T's.

On my Dodge Ram, I had the speedometer reprogrammed for my current tire size so everything meshes up.

Just my findings, hopefully this helps a little and saves you some money and heart ache.

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2005 Limited CRD (Dark Khaki)
Frankin Lift II
GDE HOT tune
245/75/16 Toyo M/T's
Black powder coated stock aluminum rims

2005 Dodge Ram 3500 CTD