You have by no means seen the full potential of the 5 port I got almost 3 gallons on mine and still gets stuck when cold. After you hit 1.5 gallons the motor will give even higher rpms. I cant belive I still have mechanical pinch never thought it still would be there. I am guessing it will last 12 gallons the way its going now. I too always ran the P3 now going alittle less hot as soon as the weather lets me