The only gas I will
never buy is Arco. I purchased it once back when I had my SRT4 and my car ran like **** for the entire tank of that watered down POS. It could have been that particular gas station (and it was when gas was really expensive and ARCO is almost always $1.00 cheaper than any other station) - so the sheer volume could have contributed to its shittiness. Thankfully you don't see too many Arco's around here in Phoenix.
QT & Fry's are where I typically fill up. Fry's has gas points that I steal from my parents.