After 4,000 miles, fuel mileage is still low. My best tank so far has returned 16.5 mpg, but the last two tanks returned 16.1 mpg. I'm a little disappointed, as I averaged a consistent 17 to 18 mpg with the old engine. But from the other posts I've read, 16 seems to be average. I'm not sure why the mileage would be lower, with a fresh overhaul and new injectors. Perhaps the engine could still use some more break-in time?
Casey
1995 K1500 Tahoe 2 door, 6.5LTD, 4L80E, NP241, 3.42's, 285/75R16 BFG K02's; 1997 506 block; Kennedy OPS harness, gauges, Quick Heat plugs, and TD-Max chip; Dtech FSD on FSD Cooler; vacuum pump deleted, HX35 turbo, Turbo Master, 3.5" Kennedy exhaust, F code intake; dual t/stats, HO water pump, Champion radiator; Racor fuel filter