I've run fuel that was $12/gal and switched to fuel that was $7/gal and the car ran exactly the same.
Best bang for the buck I've gotten in Sunoco Blue. (Bearden Oil distributor -
www.beardenoil.com NC contact:
dannypresnell@hotmail.com)
Never ran pump gas in my Sloan-built motor, but ran it for a month when I first bought the Volare and it ran the same as on race fuel. -=shrug=- I've run pump gas in my bracket Duster for years.