Find out what the "pan" capacity is. If I remember correctly the Canton pans are listed for the capacity of the "system" which presupposes a quart for the cooler. In that case the pan capacity is 7 quarts.
After the
oil has been drained refill it to the "capacity" of the pan and note where the
oil level is on the dipstick. Start the car and run it for a minute or so to get the
oil circulated. Shut the engine off and give it about an hour to make sure everything has drained back into the pan and check the dipstick again. Add enough oil to bring the dipstick level back to where it was when first checked.
DonC