Mine gets 19 mpg hand calculated.4.10s 305/70/16s thats the 01.02 gets 22.5 mpg hand calculated 3.55s ,285s ,compounds turbos ,250 hp injectors losts of goodies.I noticed a big different in just a TC and a Valve body in the 01.

 

Replaced fuel filter 2 weeks ago with oil change and other fluids. I'm not complainin' about the fuel mileage, but was just expecting more. Its still better than my wife's Tahoe!! When I can, I will look into the VB and TC for tranny and def check on pump/injector asap. Hope to be taking muffler off this weekend as well as silencer ring (just because I can ) If there are any other ideas/thoughts/comments I would appreciate them.

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Will look into this, too. Thanks.

 

throw some 2 stroke oil in to help lube everything injectors could be a little full of crap

 

Check the voltage on your APPS, and Clean both your MAP and IAT sensors.

 

How much should I put in?

I will work on that this weekend. What should the voltage be?

 

1 Quart per tank

It will tell you on the back of the apps sensor. A little white tag

 

How often should I put the oil in? Regularly or what? Thanks for the tip!

 

I put some in everytime I fill up my tank.

 

I have an '01 2500 4x4 with auto tranny and I'm barely gettin 13 for fuel mileage on the highway. I put a raptor 100 fuel pump on (fuel pressure is 19/20 at idle, 12 at wot), adjusted the valve lash, cleaned the air filter, changed the fuel filter, it has an intake, exhaust, edge juice w/attitude. I had it on cruise at 55 on mileage setting for about 250 miles the other day and it got about 13 mpg hand calculated. Not sure what's going on but I'm pretty sure something is f-ed up.