I usually go with Holiday as I get a discount of 75 cents per fill.
I don't touch BP or Walmart out of principle. I'd push my car to the next gas station before supporting either company.
However, from the other places I've gone to, haven't really noticed much of a difference (if any at all). Only exception was once at a place that didn't get a lot of customers and the gas had actually gone bad...or something got mixed in don't know. That was a rough tank.
Just make sure to check what your car manual recommends you put in the tank. In my case, it says to use low grade and to not even put mid/high.
__________________
|