Premium gasoline will boost your car’s performance
Every car has a specified minimum quality of fuel that it needs to run properly. If you fill your car with an energy source of lower octane level than required, you may damage your engine. However, most cars are designed to work with the standard fuel and using the premium one will not make any difference.
So unless you have a high-performance car which has it specified to use a special type of gas, you should follow these guidelines with no doubts. But otherwise, you may be just wasting your money.