No, don't go by those oil interval monitors since they are damn near complete crap.
If you use synthetic oil then they are total crap. The computer in the car uses a formula to determine the life of the oil based of how you drive(lots of idel time, lots of WOT, more highway then stop and go etc.) and sometimes these programs include enviromental conditions as well.
If you are using conventional oil change the oil at around 3000-4000 miles. With synthetic oil you can push that interval to 7000 miles plus. I change mine every 10,000 with amsoil oil and filter.
1989 LE Bonne 122,000 miles
Custom Open Element filter system, Strut Tower Brace from 2nd gen bonne
Light Up Pontiac symbol in grill, 16 wheels from newer Bonne/G, performance tires, performance ignition system, Upgraded brakes.