For your driving, cutting weight would be a huge benefit. I firmly believe in aero at any speed, from looking at the aero drag charts for my cars, but with accelerating so much, it should be a huge gain.
It COULD be worth while to pop out the passenger seat for deliveries, and only put in when needed. Then again, I am sometime considered more extreme on the mileage front. Come GGP, I am popping out the Mustangs passenger seat- she only needs to sit two
