R134a
From factory R-12 Should be converted to R-134
5w20 any major brand.
The 2002 Buick Regal runs on regular unleaded.
The 2003 Buick Regal runs on regular unleaded.
The 2011 Buick Regal runs on regular unleaded.
The 2004 Buick Regal runs on regular unleaded.
The 2001 Buick Regal runs on regular unleaded.
The 2013 Buick Regal runs on regular unleaded.
yes 97 to 05 century and regal are 100% interchangable
The 2014 Buick Regal runs on premium unleaded (recommended).
The 2012 Buick Regal runs on flex-fuel (FFV).
refrigerant oil has to do with A/C and is is R134A bit motor oil is 5w30 all year