Update : I bought a 2A 12V Battery Charger and I did a 100% lower grille block. I also inflated my Potenza from 50 Psi front, 47 rear, to 55 front, 50 rear.
Today on my commute I did 95.8 mpg average! Did 78.4 mpg on the morning commute and 113.2 mpg on the returning trip, my highest one-way score ever!