1994 GMC Safari Owner's Manual - Page 229

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. What Kind of Oil to Use Beginning midyear 1993, oils of the proper quality for your vehicle will be identified with this new "starburst" symbol. The "starburst" symbol indicates that the oil has been certified by the AmericanPetroleum Institute (API), and is preferred for use in your gasoline engine. You should look for this on the front of the oil container, and use only oils that display this new symbol. 6-11