'08 Charger RT - Some knock

[neonsox]

This morning I installed a catch can and decided to do some data logging (attached). I'm getting some ST knock (4 degrees) and LT as well (2 degree) when I punch it on the highway and I'm at speeds of over 100. I got the car up to 120 and the knock settles down.

Any suggestions?

[Mike_Levy]

Hemi's always knock. What kind of gas are you using? Should only use Exxon, Mobil or BP. Those are the ones with the best knock reduction additives. Shell is the absolute worst in the world.

[neonsox]

I typically use Sunoco 91 Octane gas. It's the closest and most convenient. Based on this log, should I be adding fuel in a certain range? What about timing?

[mikel]

going to take some time to work all the oil out of the intake, the catch can results are not immediate.
Adjusting now will not be right once the can is working and there is no more oil in the manifold.

Thanks

[neonsox]

How do I add fuel in the upper RPM ranges? Say 2-3%?