- Joined
- Sep 14, 2019
- Messages
- 535
- Reaction Points
- 1,230
- Location
- Dallas, TX
- Current Ride
- 2020 F350 6.7l King Ranch Tremor
- Current Ride #2
- 2004 Jeep Wrangler LJ Unlimited
Mine 6.7 is at 8k miles, and I don't see any increase in mileage either. I am reliably around 15-16 in Dallas stop and go traffic, and 21 on under 85mph unloaded highway. I have touched close to 23 on some slower, flat, no wind highway driving, but that appears to be "best case scenario" mileage unless I can find a 600 mile downhill stretch with a 40mph tailwind.
Ed
Ed