I bought Sumitomo HTR 200s, which got excellent reviews on TireRack and they're a very low-rolling-resistance tire; I saw no difference in MPG between them and the stock tires once they broke in (takes about 1000 miles for tires) though it's possible there was a 1- or 2-mpg difference, but probably not more than 1. However they are summer tires, useless in snow. I'm in southern California so they were great for me.