You are right about gasoline being the same, it is the additives that make the difference. The best is Chevron or Texaco, because of the Techron additive. I've used it exclusively in all of my vehicles, and have never had to open up a carb or injector. Since I work at a Chevron refinery (30 years) I really looked into this. But in any case, the major gasolines are better than the cut rate. You should see what the storage tanks look like when not cleaned........