Ah, I see you have since posted a picture! That is a 2015 Mirage DE.

Get your alignment checked and consider looking for wheels. Mini Cooper rims in a 4-bolt pattern fit the Mirage. Here's an example:

Appleton WI: Mini Cooper R15 rims - $200



Set of 4 original R15 Mini Cooper rims for $200.
More here: Craigslist Finds
And here: Wheels: What Else Fits the Mirage? (With photos)

Just a start to the possibilities with your new Mirage. Lots of forum members also aim to improve the fuel economy of their cars, and there are lots of threads devoted to that as well. Let us know what you think.