So I noticed actually the same FE results whether the block was on the front face or recessed into the bumper. So after some work with coroplast and lawn edging, I have a final product (for the moment) that I would love to show if the stinking page would let me post it. I average with this setup a consistent 39.8 mpg. That is only a 1 mpg improvement, but still a noticeable improvement. The biggest gains have been in handling, both wet and dry, and coast down. It now takes twice the distance to slow down from 55 on level roads as it use to. I drove through torrential rain coming home today and it held to the road so incredibly well. I was even running the ac and didn't see as big of a drop in fuel consumption.
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