Very through response Brian. The only things I can add are: remove the cross bars on the roof rack (aerodynamics), remove the trailer hitch and other extra weight when you don't need it. I left my trailer hitch on because I park on the street and it acts like an extra bumper. If you have rear drum brakes make sure they are adjusted properly. With the tires off the ground you should be able spin it and it should rotate a half or full turn before the drag of the drum stops it. If it stops immediately then the drum is adjusted to tightly. If their are high spots on the drum then it needs to be turned so that it has an even contact patch with the brake shoes and it drags evenly.