[Blue)(Fusion]

You are more than welcome to give your opinion on this forum. But the fact of the matter is, seat-of-the-pants testing means very little to us. To prove your point, you'd need to provide before and after mileage averages, even dyno results. Without this, I agree with the above posters arguing against it helping anything.

Now I'd like to give my opinion as to why. The tornado is a restriction in the air intake system. Turbulence does have benefits like MagicRat was stating above. A turbulent airflow has less friction against surfaces as compared to a laminar airflow. But the distance the air travels between where the device is installed and the throttle plate would create a minimal difference. The tornado takes up space in your air intake system, reducing the maximum throughput of it. You won't notice this at low RPMs, but if you went WOT, you likely will. The device has angled blades which, when the air strikes them, slows the air down - therefore, it is counter productive.

I am no scientist, but I am a pilot and have been trained for the last 4 years how airflow is affected and much oof the science behind flying a plane is involved in cars (i.e. venturi effect in a carb is what makes wings create lift).

If you really want to improve gas mileage, see if there are any underdrive pulleys available for your truck. These slow the accessories down, reducing parasitic drag. Do proper maintenance, use the recommended fluid specs, and drive at a reasonable speed. The faster you go, the parasitic drag is increased exponentially requiring exponentially more power/fuel to keep it going at that speed.