Recommended Engine Oils
High mileage (>150 000 km)
Priority to 40-viscosity oils for enhanced protection of worn components
Recommended Additives & Treatments
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Select year of manufacture Buick Regal IV Sedan 3.8 V6 (197 hp) Automatic
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1997
Buick Regal IV Sedan 3.8 V6 (197 hp) Automatic1998
Buick Regal IV Sedan 3.8 V6 (197 hp) Automatic1999
Buick Regal IV Sedan 3.8 V6 (197 hp) Automatic2000
Buick Regal IV Sedan 3.8 V6 (197 hp) Automatic2001
Buick Regal IV Sedan 3.8 V6 (197 hp) Automatic2002
Buick Regal IV Sedan 3.8 V6 (197 hp) Automatic2003
Buick Regal IV Sedan 3.8 V6 (197 hp) Automatic2004
Buick Regal IV Sedan 3.8 V6 (197 hp) Automatic