According to the 1997 Ford Thunderbird Owner Guide :
With engine oil filter change :
The 4.6 liter V8 engine takes ( 4.7 liters / 5.0 U.S. quarts of 5W-30 )
According to the 1997 Ford Thunderbird Owner Guide : With engine oil filter change : The 4.6 liter V8 engine takes ( 5.0 U.S. quarts / 4.7 liters of 5W-30 )
ford tbird 1996
Engine oil capacity, 5 qts with filter change.
The engine oil capacity for a 1996 Ford Bronco 351 engine is ( 6 quarts with filter change )
with filter change engine oil capacity is 5.3 U.S. Quarts with out filter change engine oil capacity is 4.8 U.S. Quarts
The engine oil capacity in a 289 CID in a Ford passenger car would be 5 qts with oil filter change.
20 quarts with filter change
I own A 1994 Ford Bronco Eddie Bauer with a 5.0 liter engine. The answer to your question is the oil capacity is exactly 6 quarts for an oil change.
6 quarts ( 5.7 liters ) with filter change
6 Quarts with filter change.
6 quarts ( 5.7 liters ) WITH FILTER CHANGE
( 6 U.S. quarts ) with engine oil filter change