Some things you could do:
1. keep up with the tune ups (big one)
2. cold air intake
3. header & exhaust kit
other then those i really cant think of anything else that would help
Whatkind of deliveries r u doing with an eclipse?

 

how is a CAI an exhaust gonna help fuel economy. If anything that is gonna hurt you

 

when my buddy did his it got him another 2mpg he hade a first gen. gs

 

his stock air box and filter was probably aweful and he was probably getting bad gas mileage as it was

 

What r u suppose to get from a GSX anyways?

 

agreed. I also heard with turbo systems you get better gas mileage. And with the 420A motor you can bolt up either a Neon trans or... I don't rememeber the others but they will give you better gas mileage but you'll be slower.

 

I have an '08 Focus (with some miles) in my showroom that shows 35.5 mpg in the message center in the dash. I use them as demos sometimes too and a half a tank of gas gets me back and forth to work and a little runnin around all week long man. One of our drivers has a 600 cc scooter. It's bad-azz LOL.

 

You aren't going to get satisfying MPG results with an Eclipse no matter what. End of thread.

 

Who ever told you that bolting a turbo on a nt car gives better gas mileage is a moron. There is a reason you need to upgrade a fuel pump and injectors when you go TC, its beacuse you need to be able to supply more gas!!.

 

LOL! You know those ppl that work on cars there whole life and swear they know everything. And how there the best ASE Certified Mechanic in the world! IDK his 1 hour theory made since at the time. Sorry for givin bad advice about the turbo