Gods honest truth dude thes motors are not built to run premium fuel. It will run it yes. It will run better yes. But if you continue to run premium fuel every time you go to the gas station you will have a massive carbon build up on the motor and it is not very fun what so ever to get that stuff out of your heads. I have seen this so many times in our shop of people running premium and only driving around town. You need to get it out on the highway every now and then.