1995 Buick Riviera Owner's Manual - Page 222

To Check Engine Oil h l l out the dipstick and clean it with a paper towel or cloth, then push it back in all the way. Remove itagain, keeping the tip down, and check the level. When to Add Oil If the oil is at or below the ADD mark, thenyou'll need This to add some oil. But you must use the right kind. part explains what kind of oil to use. For crankcase capacity, see "Capacities and Specifications" in the Index. I NOTICE: Add engine oil at the engine oil fillcap next to theoil dipstick. Just 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. Don't add too much oil. your engine hasso If much oil that the oil level gets above the cross-hatched area that shows the proper operating range, your engine could be damaged. 6-13