Hey I am new here, just picked up a 2003 cummins, has edge juice, with just toggle switch and k&n drop in filter. The over head gauge reads 22-23 but when I calculate it at the pump its 18. If I run on setting three I get the best mileage. Also looking for next step in power without loosing reliability. (if that's possiable) Any help would be awesome. Thanks Jason

 

what size tires? how many miles? mine jumped up at 20000 and really jumped up flat freeway miles with 37 inch tires to about 22-24 mpg

 

What's up fresh!

Done anything to the exhaust on that '03?

18 MPG's sounds pretty good...

How much money 'ya wanna spend?

 

stock tires and 80k, only reason I am asking is My buddy 04 dually with 150k is getting 25 and his 07 5.9 is getting 24. Exhaust is stock.

 

Let it breathe a little better. Get a straight pipe or a free flowing exhaust. Leave the EZ.

Make sure that your tire pressure is at the max.

Clean the truck, inside and out. Less garbage in the truck, less weight. Clean outside lets air flow better.

Coast to stops, keep 2x the distance from the person infront of you.



If you really want to see the milage go up, get a bunch of tacks taped to the go pedal, and drive with your right shoe off...

 

Do you have a 6 speed or auto? LOSE THE K&N their junk in our trucks!!! get a good drop in like a AFE or a whole new intake like a S&B and like said above a free flowing exhaust

 

That is pretty friggin' awesome if that is hand calc'ed.

Let me know his secrets!