Drove my 05 with the programmer on the performance mode, picked up 5.5mpg on the freeway up to 26.5mpg the only other thing I did was switch all my gearboxes to Royal Purpal Synthetic, and put in the Dynomite Diesel Fuel additive (cleaner). That is hand calculated 435mi x16.4gal.

:?: So I just pucrhased this today, easy install, was recomended from my local diesel shop Dynomite Diesel over the Smarty. I had a Edge Juice w/attitude. I was told to sell it by the shop, cause they say there garbage. And it destroyed 3 inj@ 55K And I was tired of the dealer giving me warranty ...