1994 Buick Skylark Owner's Manual - Page 217

RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS , FOR BEST FUEL ECONOMY AND COLD STARTING, SELECT THE LOWEST SAE VISCOSITY GRADE OIL FOR THE EXPECTED TEMPERATURE RANGE. HOT WEATHER "F t 100 As shown in the chart,SAE 5W-30 is best for your vehicle. However, you can useSAE 1OW-30 if it's going to be0 "F (- 18"C) or above. These numbers on an oil container show its viscosity, or thickness. not use ,Do other viscosity oils, such as SAE 1OW-40 or SAE 20W-50. LABELS "C t 38 t 27 t 16 t4 + 20 -7 If you cannot find oils with new "starburst" symbol the for on thefront of the container, you should look and use oils containing the following three things: SHor SG "SH' or "SG" must be on the oil container, either by itself or combined with other quality designations, such as "SH/CD," "SH,SG,CD," "SG/CD." etc. These letters show American Petroleum Institute (API) levelsof quality. SAE 5W-30 Energy Conserving I1 - 18 I COLD WEATHER ;il SAE !TW-30 D PREFERRED IF NEITHER SAE 5W-30 NORSAE 1OW-30 GRADE OILS ARE AVAILABLE, SAE 30 GRADE MAY BE USED AT TEMPERATURES ABOVE 40 DEGREES F (4 DEGREES C). J Oils with these words the container will help you on save fuel. These three things are usually includedain doughnut shaped logo (symbol) on most containers. you cannot I f look find oils with the "starburst" symbol, you should for oils with the doughnut shaped symbol, containing the three things noted above. DO NOT USE SAE 1OW-40, SAE 2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED m 215