Installed brake pad drag reduction clips today. They seem to work well.
The idea is to not let the pads rest against the rotor. The clips push the pads apart, off the surface of the rotor.
In neutral, I can now coast on a very slight incline. I'm not expecting a big increase in mpg. Any difference may be to slight to attribute to the clips.
I removed the calipers, squeezed the clips, and inserted the ends in the slot so they hooked inside the pads on each side. Getting them all the way in was a little tricky.
They don't look it in the picture but all 4 clips were symmetric.
Raybestos H6001 Professional Grade Disc Brake Pad Drag Reduction Clip