Factory oil change procedure states (after draining tank & crankcase) to pour 3 qts into the oil tank, run motor 1-2 minutes, shut off, then add oil to top line of cap dipstick.
NOTE: Only check oil level right after motor has run because some day the oil pump check valve will let some (or all) of the tank oil drain into the crankcase after sitting. Topping off otherwise will cause overflow.