5 qts
On a 1991 Mercury Cougar : The oil pump is INSIDE the oil pan ( the oil pan is bolted to the bottom of the engine )
Use Super Premium SAE 5W-20
According to the 1999 Mercury Cougar Owner Guide : ( 5W-30 ) is used in the 2.0 litre four cylinder engine and the 2.5 litre V6
5w 30
5w30
near the oil filter
with your eyes
You need an oil change.
Mercon V
5w 20 ======================================================== The above answer of 5W-20 is correct if it is a 2001 or 2002 model year according to the Mercury Cougar Owner Guides ( 1996 , 1997 , 1999 , 2000 guides show 5W-30 from the factory )
According to the 2000 Mercury Cougar owners manual ( 5W-30 ) for the four cylinder and V6 engines