Anyone get bad gas at the pump?

We have a Chevron on the corner and over the years every time I get gas from there my car runs poorly and my wife's gets knock. It also lowers the MPG's by 25%ish. It took a year or so to figure out that it was only happening with their gas. Now, I only go there if I'm in a real hurry and low on gas. Yesterday was one of those days.

Anyone else have a certain station or brand that doesn't agree with their car?