We just got back from a weekend trip to Chicago (took the family to the Museum of Science and Industry). We didn't take the trailer (we were going to, but did not). Ran 69 - 74, about 4 over posted limit. Solo, I got 18.4 MPG for the trip. On winter blend fuel. No programmer. Only the 6637 filter and an FPR shim, other wise stock. Used Power Service in the white bottle. Truck is 2WD CC LB PSD with 6MT and 3.73's.
Wait until you open up the intake and exhaust and can hear the turbo whine of the early 99. It's fo shizzle some sweet music. waytogo rotfl