Welcome to GasSavers:
I don't know what sort of epa ratings the Element has.
One thing I do know is that it's unlikely that you will be able to get better mileage, until your aware of what you are currently getting and your interested in trying.
One difficulty is that as you make changes, they are usually percentage changes. If your starting out from a base of 18, around town, then even if you have a 10% improvement, it's only going to amount to 1.8 mpg. If you were at 30, then you would see a 3mpg improvement.
A big challenge is that it's a box on wheel's.
I would get a scangauge, before I even considered anything else, just so you can see what your doing, how it's working, what seems to help, what doesn't seem to help. Their are other things you can do, but until you get a tool to help you figure out what you can do to improve the driver, everything else you do is going to be an extended, blind exercise, where it is hard to draw conclusions and easy to become discouraged or disallousioned.
Glad to have you.
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