The Tech Q&A Forum on PCA Panorama web site endorses Chevron w/ Techron. A few months ago, there was a question on fuel additives, at which time Techron was singled out and Chevron was endorsed.

For track days, I add 4 gallons of Sunoco 100 octane to my tank, then fill w/ 91 octane Chevron if available, though in a pinch I'll use any of the major chains. I avoid no-name brands as they can have some water or other garbage in their gas.

Greg