There are published studies that show just how close Mobil, Exxon, Shell, and Texaco are from one another. While I can't remember who won last year's test I was told by an industry expert that the difference is negligible.
However, I have also been told that once you move away from the bigger guys and go to 7-11 and some smaller players that there can be a noticeable difference. This info is coming from a very high level Shell Oil employee.
However, I have also been told that once you move away from the bigger guys and go to 7-11 and some smaller players that there can be a noticeable difference. This info is coming from a very high level Shell Oil employee.
