Whatever the highest you can get out of the pump that's "standard" fuel. in other words, no race fuel. Lots of places sell race gas right out of the pump......at least they do here.
That said, When I do a build for me, I want it to be able to run on 87. End of story.
I guess the whole thing with pump gas to me are the racers who say pump gas, but never say if it's 87, 89, 93, e85 or whatever. It has always made me wonder what they're really pumping.
