1996 Buick Regal Owner's Manual - Page 236

RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS FOR BEST FUEL r---'--lY AND COLD STARTING, SELECT THE LOWEST " . G ,I1 FOR THE EXPECTED TEMPERATURE RANGE. SAE VISCOSITY - As shown in the chart, if you nave the 3.8L engine, SAE HOT WEATHER "F WOK FOR MIS SYMBOL low-30 is best for your vehicle. However, you can use SAE 5W-30 if it's going to be colder than 60°F (16°C) before your next oil change. When it's very cold, you should use SAE 5W-30. These numbers on an oil container show its viscosity, or thickness. Do not use other viscosity oils, such as SAE 20W-50. "C \ NOTICE: Use only engine oil with the American Petroleum Institute Certified For Gasoline Engines "Starburst" symbol. Failure to use the recommended oil can result in engine damage not covered by your warranty. I - +loo- - +38 +eo- - +27 +60--+16 t40--+4 t20---7 0---18 SAE 1OW-3fl PREFERRED ' / I I above 0°F (-1eOc) SAE 5W-30 GM Goodwrench@oil meets all the requirements for your vehicle. 1 COLD WEATHER DO NOT USE SAE 2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED .ILIVC Don't add anything to your oil. Your Buick dealer is ready to advise if you think something should be added. 3.8L L36 (Code K) Engine