Octane Booster Fuel Additive

I have used 104+ since 1980 and it works as well to me as any racing or avaition gas I have used.I run one of the black bottles the stronger version of the two to 10 gallons of premium unleaded..When I started using it in 1980 you could still buy sunoco 260 leaded premium at the pump,and the 104+ in the small metal can at the time worked just as well when added to a tank of regular leaded gas.