Yeah, it always used to be 10 cents different between grades here in DFW, but now I see it generally for 15-20, but still sometimes only 10. It really depends on where you are. Up in Michigan it tends to still only be a 10 cent differential per grade, but I've seen it for more, as well as a lot less. The Sunoco by school in Flint sometimes has it for only 4 cents more per grade.
