01 Tribute, V-6, auto. Simple mods for MPG?
 

What can I do to make immediate significant gains in MPG? High-performance air filter? Remove an air baffle somewhere? I'm looking for an inexpensive and simple thing or two to do. Thanks!

Throttle Body Spacer. 1-2 mpg increase. Search! Good luck in finding one. Maybe you can go to machine shop and get one custom made. 1/2" thickness to 5/8" thick should be good. Need longer bolts. bolts right between throttle body and intake.
Use Fuel System Cleaner 1-2 times a year.
This is what one looks like (for Mazda 6):
https://www.mazdaforum.com/forum/mem...r-end-2172.gif