[TaylorMade]

I know I should search and everything, but I already did. I got about 15 miles to the gallon last fill-up. I cant be sure though, cause I dont have a credit card, but I only got 140 miles when 3/4 of the tank was gone. (Im filling up a the quarter tank line now thanks to mx-5's and other people's experience with it.) I have a k&n, both silencers removed, and a less restrictive muffler. I do have to idle for about 10 minutes a day, because I have to wait to pick my brother up from school. How much does that waste? I also revved the engine alot during that fill up, what about that? Will better spark plugs and wires help?