wait till you get that ultragauge that will give you a good bump if you watch it closely.
pump the tires up! fill em to what the tire says! 44PSI im guessing.
not sure gutting the interior will gain you anything at 90% highway.
get a kill switch in that thing! you can probably go 65MPH to 55MPH pulse and glide and get the same mileage as a steady 55! do 65-45 P&G and smash that!
shift 1-3-5 keep it in high gear as much as possible!
belly pan will help alot too.
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