1996 GMC Savana Van Owner's Manual - Page 235

Engine Oil (Gasoline Engine) If your vehicle has a diesel engine, see "Engine Oil (Diesel Engine)" in the Diesel Engine Supplement. It's a good idea to check your engine oil every time you c Get fuel. In order to get an accurate reading, the oil must ' be warm and the vehicle must be on level ground. Turn off the engine and give the oil a few minutes to drain back into the oil pan. If you don't, the oil dipstick might not show the actual level. When to Add Oil If the o i l is a t or below the ADD mark, then ~011'11need to add some oil. But you must use the right kind. This part explains what kind of oil to use. For crankcase capacity, see "Capacities and Specifications" i n the Index. NOTICE: Checking Engine Oil Pull out the dipstick and clean it with a paper towel or cloth, then push it back i n all the way. Remove it again, keeping the tip down, and check the level. Don't add too much If your engine hasso much oil. oil that the oil level gets above the upper mark that shows the proper operating range, your engine could be damaged.