What would you do for another 1-2 mpg in fuel mileage?

What would you do for another mile or two per gallon in running fuel mileage? How does a six-year odyssey in modifications to your truck’s engine and related systems, reducing the draw on the engine from the main fan and A/C and more sound? That’s in essence what thinker-tinker, so to speak, inventor, and independent owner-operator Kenny Capell did. Based in East Tennessee, Kenny continues to modify his own Freightliner Columbia and Detroit to get to the point where not only is he achieving about a mile-and-a-half overall running fuel mileage benefit. He's moving toward also eliminating idling entirely with the integrated system, now officially patented by himself and his sister, Patti Lane. Pictured here: The modified engine fan with four electric fans -- one among many aspects of the custom-designed system.