What engine do you have?
According to my Chilton's Auto Repair manual : For a 1988 Ford Thunderbird ( 3.8 liter V6 engine ) With engine oil filter change : ( 5.0 U.S. quarts )
exactly 5 quarts of 5w30
5.5 Qts
According to my Chilton's Auto Repair Manual : With engine oil filter change : The 1988 Ford Thunderbird engines ( 2.3 / 3.8 / 5.0 ) take : ( 5.0 U.S. quarts )
According to the 2002 Ford Thunderbird Owner Guide : The 3.9 liter V8 engine takes : ( with engine oil filter change , 5.7 litres / 6.0 U.S. quarts of engine oil )
Probably 5-6 quarts Add 5 and check
According to my Chilton's Auto Repair Manual : For a 1987 Ford Thunderbird , 3.8 liter V6 : With engine oil filter change : ( 5.0 U.S. quarts )
oil and filter change = 7lt .
I just personally changed my oil the other day. It took five liters. That's for the base model, anyway.
According to my Chilton's Auto Repair manual : For a 1991 Ford Thunderbird , 3.8 liter V6 engine ( supercharged and non S/C ) With engine oil filter change : ( 5.0 U.S. quarts )
5W-30 is the preferred oil , according to the 1996 Ford Thunderbird Owner Guide
5 quarts