In my PFI engines I would run grocery store gas (which always had lines meaning the gas was always fresh) and throw in a bottle of Techron every oil change. But with my GDI engine vehicles I am sticking to Top Tier gas. I am not loyal to one brand but I usually get Chevron/Texaco, Shell, or Unocal because that is what is around me (Chevron being the most local for me).
I occasionally get Costco which IS TOP TIER, but it is not a convenient location for me unless I am actually shopping there (once a month).
I occasionally get Costco which IS TOP TIER, but it is not a convenient location for me unless I am actually shopping there (once a month).