mpg

[BigRedFord04]

best way i've ever heard it put is that an engine is like a big air pump, the easier air can get in and out the more efficient it will be.

my suggestions would be a K&N filter (not a full kit), good exhaust, TB spacer (contrary to popular belief, i saw a bit of an improvment when i put mine on about a month ago), and synthetic fluids. i've also read that wrapping your air intake hoses w/ insulation to keep heat out helps keep the air cooler, i.e. more dense > more O2 > more efficient. i know its no fun but stay off the skinny pedal. i know the newer motors dont need spark plugs very often so replacing them might not do much for you. if you've got a bunch of miles on it run some fuel system cleaner thru the gas tank and get the berryman's fuel system cleaner thru the vacuum system, i've always found that stuff does great.