Non car people and their crazy fuel saving ideas.

72Dodge said
Well, you know the new 5.7 Hemi's (at least the truck ones, not sure about the car version) do that, and it seems to work quite well, and does save gas. Of course, the engine was designed for it to work, not the same thing as just unplugging half the plug wires!
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My brother's Magnum R/T with the 5.7 Hemi has cylinder displacement. It cuts out cylinders at highway speeds. He averages 22 MPH highway, and he drives that dang Magnum like he stole it.