Originally Posted By: gr8gatzby
I've the heard the argument: "Ford would've used these to increase their CAFE standards from the factory if they actually worked to increase economy."
If this were a new truck, that would be an accurate statement. However technology has changed quite a bit in 17yrs and I'm inclined to think that in the natural evolution of technology has netted products that inherently increase fuel economy as a net effect of 17years of development. It's worth a shot, methinks, for the small investment required. Comparing these to the infamous Tornado is a bit of a stretch though.
And Ford has used technology to increase MPG in the last 17 years. Transmissions with more gears and longer OD ratios and smaller turbocharged ("EcoBoost") engines.
Over the years I've seen a few articles in Popular Mechanics, Car & Driver, and others, testing these sort of "innovations." Not a one of them increased MPG, but some did decrease it.