YKYAEM...
... when you see the "Fuel Saving" gizmos at your local *Mart (Walmart, K-Mart, Save-Mart, etc) and 1) you already know they don't do squat, and 2) you already know the background story behind each one (the 'theory', the claimed 'improvements', the debunking of the claims, etc.)
... and you can visualize each of the gizmos in a pink corral...
