1993 Cadillac DeVille Owner's Manual - Page 147

Fwc- t Center a Press and hold the Range and Fuel Used buttons to display the oil lifepercentage. c l You'll see how much oil lifeyou have left, as a percentage. So if you see "94" for example, that means that theway you're driving your vehicle, left. 94% of your current oil life is still The "CHANGE OIL SOON" light will come on for a few seconds as a bulb check when you start your engine. The light will also come on for 20 seconds following engine start-up when either theoil life percentage is less the 10% or 7,500 miles (12500 km) have been driven. The system probably will say to change the oil between 3000 miles (5000 k ) m and 7500 miles (12500 km), but it may even say to change it before 3000 miles under severe conditions. It all depends onyour driving patterns. (If it up, doesn't, or if it doesn't even light thensomething is wrong. You will need to have it serviced.) There are two things the system won't do: Itcan't sense heavy dust in the places where you drive. If you drive ina dusty area, you should change your oil every 3000 miles (5000 km) or 3 months (whichever comes first), unless the "CHANGEOIL SOON" light comes on sooner. It doesn't check how much oil you have so you will still haveto check for that. To check it, see theIndex under "EngineOil." When You've Changed the Oil When new oil isput in, you'll need to reset your system. To do that, press and hold the "Range"and "Reset" buttons between 5 and 60 seconds.