According to the 2000 Mercury Cougar owners manual ( 5W-30 ) for the
four cylinder and V6 engines
Mercon V
You need an oil change.
5w30
If it is a V6 about 6 Quarts with a new oil filter.
According to the 2000 Mercury Cougar Owner Guide : With engine oil filter change : The 2.5 liter V6 engine takes ( 5.5 liters of 5W-30 engine oil )
5W30 full synthetic.
6 ---------------------------------------------------------------------------------------------------- According to the 2000 Mercury Cougar Owner Guide : With engine oil filter change : The 2.5 liter V6 engine takes ( 5.5 liters of engine oil ) * the first answer is not mine , the corrected answer is , Helpfull *
For a Mercury Cougar , 2.5 litre V6 engine : According to the 1999 to 2002 Owner Guides : ( Motorcraft FL-820 engine oil filter )
On a 1991 Mercury Cougar : The oil pump is INSIDE the oil pan ( the oil pan is bolted to the bottom of the engine )
SAE 5w30 any major brand.
Recommended amount is 5 and a half quarts of 5W20=========================================According to the 2000 Mercury Cougar Owner Guide :With engine oil filter change :If you have the 2.5 litre V6 engine , but it indicates 5W-30For the 2.0 L four cylinder ( 4.5 quarts ) of 5W-30
5w 30