I know it's a smaller, Midwest company, but I don't see Quiktrip listed. It's one of the few that meets the "Top Tier" regs by automakers.
I'm a bit partial since they have a distribution center for their Convenience Stores, located nearby. I believe they're Oklahoma-based.
But, I suppose the info confirms BP as my top choice between Shell and the Brits (most common around here). I've boycotted ExxonMobil for a couple years, and ConocoPhillips' price gouging during 9/11.
How's about Sinclair?
Had to use the turtle
RH77