1998 Chevrolet Express Van Owner's Manual - Page 253

Be sure to fill it enough to put the level somewhere in the proper operating range. Push the dipstick the way all back in when you're through. RECOMMENDED SAE YlSCOSllY GRADEENGINE OILS FOR BEST FUEL ECONOMY AND COLD STARTING, SELECT THE LOWEST SAE VISCOSITY GRADE 011 FOR THEEXPECTEDTEMPERATURERANGE. What Kind of Engine Oil to Use Oils recommended for your vehicle can be identified by looking for the "Starburst" symbol. This symbol indicates that the oil has been certified the American by Petroleum Institute (API). Do not use any oil which does not carry this Starburst symbol. 1f you change your own HOT WEATHER LOOK FOR MIS SYMBOL atfi t A 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 gasoline engines. J I I . SAt d-30 PREFERRED You should also use the proper viscosityoil for your vehicle, as shown in the following chart: COLD WEATHER DO NOT USE M 20W.50 OR ANY OTHER E GRADE OIL NOTRECOMMENDED I