It's been close to 2 months with my 13" Honda Civic VX wheels. Overall, acceleration is better from a stop. My MPG gauge is showing me I'm getting between 49-51mpg during my commute. I have 175s vs the 165s. The 13" wheels do help a bit with accleration, that's for sure.

As for less rotation mass for the Mirage, I'm not sure what else could be done. If anything, like Loren said, it might be lots of work to re-coup gains. I wouldn't mind installing a lighter flywheel, pulley system, etc just to see some improvements. Maybe if it was just 5-10% improvements, that's still not bad.

I did some researching and here's the differences of wheel+tire weights with the stock 14" Mirage steelies+tires versus the 13" honda wheel+tires.
https://mirageforum.com/forum/showth...ll=1#post71722