1998 Cadillac DeVille Owner's Manual - Page 299

Checking Engine Ol i Pull out the dipstick and clean it with a paper towel or cloth, then push it back in all the way. Remove it again, keeping the tip down, and check the level. I NOTICE: Don't add too much oil. your engine has If so much oil that the oil level gets above the upper mark that shows the proper operating range, your engine could be damaged. The oil fill cap is located behind the radiator on the passenger's sideof the engine. Turn the cap to the left to remove it. When to Add Engine Oil If the oil is at or below the ADD line, then you'll need to add at least one quart oil. But you must use the of of right kind. This part explains what kind oil to use. For crankcase capacity, see "Capacities and Specifications" in the Index. Be sure tofill it enough to put the level somewhere in the proper operating range. Push the dipstick all the way back in when you're through. 6-12