Originally Posted by Jim Hef
20 percent or 50 percent...you're still turning all the hardware! Can't expect a mileage difference from this.
Yeah, it is going to result in more of a handling difference than any change in fuel efficiency. Since less power goes to the front wheels, you aren't asking them to do as much, so there's likely to be a marginal improvement in handling. Probably not night and day, but enough for those who want to find a difference to notice something on the butt dyno.