The oil pan is at the bottom center of the engine, and the plug is on the back of the oil pan, facing the rear of the car. It can only be removed with an open end wrench because of the limited space between the plug and the exhaust pipe.
According to the 2000 Mercury Cougar owners manual ( 5W-30 ) for the four cylinder and V6 engines
You need an oil change.
Mercon V
at the bottom of the oil pan under the car.
14mm
The oil drain plug is located under the front end of the car, on the rear side of the oil pan.
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 )
15mm wrench. righty tighty, lefty loosy. so turn it counter-clockwise... dont forget the oil filter
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 *
On a 1991 Mercury Cougar : The oil pump is INSIDE the oil pan ( the oil pan is bolted to the bottom of the engine )
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