I have a couple questions for you guys but first my comments
...some of you guys are doing some CRAZY things for fuel mileage
...now I'm just trying to figure out how far I'm going to go..
1) I have the factory "wing" on my Civic (pic below). I'm sort of indifferent about it but I'm for leaving it on because of the 5 holes that would be left in the trunk lid. In your opinions, would I see a considerable mileage increase from removing it? What about the side window vent visors (sunroof visor has been removed).
2) I have two sets of wheels. The winter set consisting of the stock 15" alloys with 195/60's (IIRC). Two have snow tires and two have all-season tires. My summer tires on HEAVY (relative to the 15's) 17's with 215/45's. Some of you are going to want to punch me in the face when you hear this but I'm losing anywhere from 15-25% fuel mileage with them...and that's relative to my winter fuel mileage...so, I'm considering running the "winter set."...would I be ignorant in running the snow tires but keeping them in the rear? Or will they be too soft? (I'm assuming so
)
Anyway, any advice would be appreciated. My other FE mods are being dropped about 1.6" (very surprised at how much that is helping), running 35% or darker on ALL windows (obviously, less A/C demand), and am working on an exhaust (not sure if it's going to help but figured I'd give it a try).
awenthol 
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