FYI in USA side... It really does not matter where! You never know who this gas station REALLY get gas from! I have seen Mobile gas station buying gas from other brands!!! Whats more, where do we get gas from? OIL of course! same thing. It all depends on how well this gas station taking care of their station. I hate Kwik fill gas station, know why? These owners don't give damn about the gas tank underground... they don't care if it gets water in! That is a big NO NO!!!
Friend of mine always buys premium gas and always go to Mobile.... after 4 years, guess what he just told me? He was sorry sucker bought expensive gas at Mobile and he lost his Blazer!!! Told me that I was right all along about wasting money on premiums... It does not pay to have premium gas.... if you calculate the difference between reg and premium and multiply them to get annual cost,.... way way more than what new motor would cost! So, all matters is GAS IS GAS, and how well this gas station keeps their station running. I like Sonic Mart gas station because they are high volume and keeps their pumps clean and well maintains their tanks.