I was wondering how much worse gas mileage I'll get with 4.10 gears. I have a 2001 Mustang, v-6, and right now, I get an honest 27.5 when I'm driving like a good boy. When I'm not, it falls off to I don't know what, but what kind of gas mileage could I expect with the 4.10 gears? Is it worth the loss of gas just for the increase in acceleration?... are 4.10 gears better than 3.73?