1996 Chevrolet Astro Owner's Manual - Page 217

To Check Engine Oil Pull out the dipstick and clean itwith a paper towel or cloth,then push it back in all the way. Remove it again, keeping the tip down. When to Add Oil If the oil isat or below the ADD line, then you'll need to add some oil. But you must use the right kind. This explains what kind of oil to use. For part crankcase capacity, see "Capacities and Specifications" in the Index. NOTICE: Don't addtoo much oil.If your engine has much oil that the so oil level gets above the cross-hatched area that shows the proper operating range, your engine could damaged. be Just fill it enough to put the somewhere in the proper operating level range. Push the dipstickall the way back in when you're through. 6-9