Jaguar and Ferrari seem to do OK carting around 15 gallons or so of liquid. :) Baffles as gonzo mentions, and keep it low. Bonus here is it won't be a diminish

Jaguar and Ferrari seem to do OK carting around 15 gallons or so of liquid. :) Baffles as gonzo mentions, and keep it low. Bonus here is it won't be a diminishing load like petrol.