Running premium on that engine is a waste. It will actually make you run rich. Yes your ECU will make adjustments to correct for changes in fuel, air temp/density... Which means that you could get better gas mileage with higher octane fuel... but there's no need to run anything higher than 87 octane on a factory-spec Honda SOHC. Certainly not enough of a performance boost to warrant doing otherwise on your daily driver with gas prices where they are.