[azraelswrd]

Here's how I would order the mod priorities:

1) your driving style/habits
Read the 100+ tips (again)
Get a scangauge (or some other way to get instant feedback on MPG)
reduce idle time
reduce accesory usage (ie A/C)
get to your most efficient speed ASAP

2) engine maintenance
oil/oil filters
spark plugs
fuel type


3) tires
low rolling resistance type
proper air pressure
proper alignment

4) weight reduction
if you don't need it, dump it

5) aero
"smooth" out the car's profile by covering/removing anything that creates bad drag
-grill block
-smooth hubcaps
-belly pan
-front air dam
-rear wheel skirts
-side/front/rear wheel fairings
-wiper wind deflector
-remove passenger side mirror
-remove racks