You're fine with 8 quarts, don't add anymore.
To reset your oil life, use your information arrows (to the right of the speedometer) & scroll up or down until it shows the remaining oil life. (Ignition on or engine running.)
Press & hold the reset button until it displays 100%.
This information from Cadillac Tech
Now he has you doing his work
Next you will be telling us he took over the camera duties
You guys have a great holiday!! we'll definetaly have to get together after the New Year!!
You have to check the oil when the engine is hot on all Northstar engines. Will read low when cold Doug-j