Here in Mass gas in no name stations are running around $2.05 per gallon, a lot less @ BJ's, while in big name stations are 15 to 20 cents higher. Feels good at low cost gas when filling a 80 gallon ...
www.gasbuddy.com is your friend! I never buy fuel without checking there first. If your rig is long, Google Earth is often helpful to avoid tight/backing/turning situations. Most refined gasoline is intermixed and comes from the same tanks with the exception of ARCO, at least in California. The additive portion may vary from brand to brand. A few years ago ARCO had their own pipeline but they may share that now too.