Using Octane Boost Instead of Premium Fuel
While store bought additives are in general fairly safe, only a handful of them actually improve your octane by a reasonable amount, the rest simply take your money. If you own a high octane sports car and are contemplating using the low octane gas and adding octane booster to compensate, you really need to think if that will be a worthwhile decision.
First, you will have to find an octane booster that actually boosts octane by a measurable amount, then you will have to decide if you are actually saving anything considering the expense of the booster as opposed to just premium gas. You should also know that most experts will tell you that quality gas is most always preferred over an additive of any kind.