Mods:
grille block and/or air dam
45psi in my tires
-I also haven't really done anything else to my car-
Techniques:
EOC
good route planning-- you can neutral-coast, EOC, and P&G a lot easier on backroads than the interstate
drive conservatively, even if not outright hypermiling-- shift as early as possible, generally go as slow as is reasonable-- don't get in the way.
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