That's what I use for my grille block. It's getting brittle and the outer surface is pitted, after three years in service.
I worry about the thickness catching extra wind on the wheels, and whether it's stiff enough to not flap out and catch the wind. But please, try it and report back! That's what we're all about here.
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11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles
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