1996 Buick Regal Owner's Manual - Page 234

I What Kind of Oil to Use Oils recommended for your vehicle can be identified by This looking for the "Starburst" symbol. symbol indicates that the oil has certified by the American been Petroleum Institute(API). Do not useany oil which does not carry this Starburst symbol. 3.1L L82 (Code M) Engine 3.8L L36 (CodeK) Engine Just fill it enough to put the level somewherein the proper operating range. Push the dipstick all way the back in when you're through. If you changeyour 'own oil, be sure you use oil that has the Starburst symbol on the front of the oil container. If you have your oil changed for you, be sure the oil put into your engine is American Petroleum Institute certified for You should also use the proper viscosity oil your for vehicle, as shown inthe following chart: i I