1996 Buick Regal Owner's Manual - Page 235

RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS FOR BEST FUEL -------ylY AND COLD STARTING, SELECT THE LOWEST SAL VlSCOSlTV bnmws DIL FOR THE EXPECTED TEMPERATURE RANGE. - HOT WEATHER "F 4- , LOOK FOR T I H S SYMBOL As shown in the chart, unless you have the 3.8L engine, SAE 5W-30 is best for your vehicle. However, you can use SAE low-30 if it's going to be 0°F (-18°C) or above. These numbers on an oil container show its viscosity, or thickness. Do not use other viscosity oils, such as SAE 20W-50. 100 + 801 t 60. + 16 i 4 + 40t 20 0. -7 j COLD WEATHER SAE CW-30 PREFERRED 00 NOT USE SAE 2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED 3.1L L82 (Code M) Engine