[WardL]

100% of the fuel additives to boost octane or power in your fuel are bogus. For 3 ounces in a gallon of fuel to boost it 10 points it would have to be over 500 octane. Maybe if it were pure tetra ethyl lead. Do you buy regular gas at 87 octane and with your Klotz additive you have 97 octane? How does your Cobra run on that blend? Your mind tells you the additive is suppose to help and you get tricked into thinking it really does help. Carb cleaner if your carb is dirty or a stabilizer if you are going to store gasoline for 3 years or more. Gasoline will normally stay fresh for at least 2 years given it is kept cool and dry.