2003 Chevrolet Malibu Owner's Manual - Page 223

Notice: Don't add too much oil. If your engine has so much oil that the oil level gets above the upper mark that shows the proper operating range, your engine could be damaged. -I SAE 5W-30 d For engine oil fill cap location see Engine Compartment Overview on page 5- 12. L m When to Add Engine Oil If the oil is at or below the cross-hatched line, then you'll need to add at least one quart of oil. But you must use the right kind. This part explains what kind of oil to use. For engine oil crankcase capacity, see Capacities and Specifications on page 5-87. Be sure to fill it enough to put the level somewhere in the proper operating range. Push the dipstick all the way back in when you're through. 5-14