On top of the timing advance from the Pulsar programming the motors have a compression ratio of 10.5:1 which is certainly in premium fuel territory. My truck is stock and I only put premium in.
( still waiting on more reviews to get the pulsar) Timing advance is a term for the computer “advancing” when to send the spark to the spark plug so that the fuel and air in the cylinder starts to combust just before the piston reaches Top Dead Center or it’s highest point in the cylinder. Since the fuel and air doesn’t burn instantly you want the spark to happen just before it reaches TDC, but this can cause a lot of knocking if the right grade fuel isn’t used. I think the Pulsar manual says to only run premium if in Tow or Performance.
Hope that helps