So I was wondering as I was driving home, would my STi be more fuel efficient at highway speeds if it was tuned for more torque or more HP. Diesel trucks and coaches are torque monster and no matter how much weight the are pulling it doesn't seem to phase them fuel economy wise. Can you even tune a car to be almost all torque and no HP and visa-versa, or do you have to do it with hard parts. Just random thoughts what do you guys think