Since I live close... in and out at mid-night is only 45 min. Minus the cost for gas, my avg. savings is about $8-$12, which is pretty good for me consider I don't have to work and I can exercise my car on the highway.
for my car, it's actually good to run on the hwy. (change from the richmond only daily driving) And it's only ~ 50k round trip for filling up. now they open till 10pm, I can take my time. Make dinner, eat, clean up, driving down and fill up.