Using premium gas in an engine designed for regular can only hurt performance not give you better performance.
Not only that, using premium gas in an engine designed for regular can and most likely will GREATLY increase the chances of harmful deposits in your cylinders.
The reality is regular gas is more explosive/easier to ignite then premium gas. (most people think the other way around because the word premium)
In a high compression engine, premium gas is required because premium gas is harder to ignite. This prevents pre ignition in the cylinder which prevents the fuel mixture from exploding (igniting) before the spark plug fires.
SO the ONLY thing about "Premium" gas is the premium price, it is NOT a better fuel then regular gas, its only a fuel that is harder to ignite, due to lower production numbers and higher profits, premium gas is only premium in price, no better then regular, just different application.
Using premium gas in an engine that requires regular gas, simply may mean the gas does not get a chance to fully ignite and may/many times, leaves behind deposits in the cylinder and piston.