1996 Pontiac Grand Prix Owner's Manual - Page 238

Checking EngineOil Pull out the dipstick and clean it with a paper towel or cloth, then pushit back in all the way.Remove it again, keeping the tipdown, and check the level. When to Add Oil If the oil is at or below the lower mark, then you'll need to add some oil. But you mustuse the right kind. This part explains what kind of oil to use.-For crankcase capacity, see "Capacities and Specifications" in the Index. NOTICE: Don't, add too much If your engine has oil. so much oil that the oil level gets above the cross-hatched area that shows the proper operating range,your engine could be damaged. 3.1L L82 Engine 3.4L LQ1 Engine 6-11