The 1996 Buick Regal likely uses
Dexron-II or Dexron-III automatic transmission fluid. However,
you MUST check your owner's manual. The specific type of fluid recommended will depend on the type of transmission your particular Regal has (some had different options). Using the wrong fluid can severely damage your transmission.
Don't rely solely on online information. The owner's manual will definitively state the correct fluid specification.
