Well it was at a wide range of speeds. Some of it was stop and go, and a couple a hard starts to show off to the guys at work lol. My normal average before the new intake would range between 19 to 20.5
Now my mileage is probably better than most cause my truck is a two wheel drive with the 4.7. The new ram has the 5 link rear end which i have notice a lot smoother ride over the ruff roads around hear. I really like mine, I see a lot of the Hemi's around town bout I don't know how well they are on the gas. They do have 390 hp where as mine has 310. Best input i can give is if you are looking, test drive one of each and see which one you like best.