BOOSTane Professional Octane Booster, Formulated to Increase Octane for High-Performance Race Engines, 32oz (1 Pack)

I bought this to use as a diagnostic tool. I recently upgraded my turbo and ECU/ECM, and was seeing a lot of knock. If the knock was caused by too low octane, then adding this would reduce or eliminate the knock. In my case it didn’t help which indicates that my intercooler is now too small for the amount of boost I am running.The product seems to work, but their usage “calculator” is a joke. It asks for gallons of fuel to be treated, and desired horsepower. When I contacted them about their bogus calculator, they told me it assumes you are using 93 octane gasoline. So it appears to me the horsepower entry is just a marketing gimmick.Luckily there is a usage chart on the bottle which will help you figure out how much you really need to use.For fun I entered 16 gallons and 1.0 HP, and their calculator came back with 1.03 HP and 0.53 quarts of additive.Think about it this way: A value of 100 horsepower it is meaningless without knowing what the engine size is. 100 horsepower out of a 500c engine is a lot, while 100 horsepower out of a 2000cc engine is not. In my opinion their calculator does more harm to their image than good for marketing the product. To be useful the calculator should ask for gallons to be treated, its octane, and the desired octane. If enough people complain maybe they will fix it.This additive will not give your engine more horsepower unless it needs a higher octane fuel than you can get. If you have a modified engine and the tools for tuning it (knock sensor, programmable ECU, engine management software, etc.), then you can increase the timing and/or lean out the mixture to get more power out of your engine. Do this incorrectly and you could blow your engine.