concern about oil capacity

[michael]

I just receive a copy of an owners manual for my Pontiac GTO with a 389 motor the manual says 6 quarts oil with filter my chiltons book says 5 quarts with filter which is it  I'm hoping I've been doing it right with 5 quarts very concerned

   

[TWO LANE BLACK TOP]

What year GTO..??

Would start with five quarts..Then check the oil level..Then add if necessary until the dipstick indicates full...Make sure the oil filter is full before checking....Don't overfill... 

[Virginian]

My '66 hold Seven (7) quarts, with filter.