[Gealii]

Welcome. Having slightly larger tires can actually help with fuel economy if your not stop and go on back roads its different for where you live my back roads are 2 miles b4 the next intersection and are 2 way stops at the intersections so its better then driving highway to me. There is a thread that talks about whether your factory spoiler helps with FE or not. I think the main idea was take it off and test it, but in my opinion if you don't have a park bench on the back i wouldn't worry about it to much