Shooting for 400 mile/tank

Was going from Outside of LA back to Scottsdale....filled up at a Costco with 91 (4.09 gallon ugh)....cruise control between 75 to 80 the whole trip back with A/C..pulled into the Scottsdale Costco and refilled with 19.7 gallons of 91(3.92$ for those keeping score at home)...380 miles...actually not bad for the speeds I was keeping...never went above 5 mph over the limit and some pretty nice hills outside of Palm Springs.

 

474, filled with 19.5 gallons.
Light came on at 425.
Guess if I ran to dry I could have gone 505 miles but that might be sucking the very bottom of the tank.

 

I got 378 miles on my return trip from NJ yesterday. 50 miles was local stuff, the rest all on I95 running 74-79 MPH. Filled up with 18.89 gallons si it was close. I usually fill at a quarter tank but having two dogs in the truck whining (until I drugged them) distracted me.

 

405 miles right now, and gas gauge reads a hair above the 1/4 tank line.