R-12
5w30
It came from the factory with R12. Due to the high cost of R12, I would have it converted to R134.
It will take a skilled mechanic approximately 5 hours to change the fuel pump in your 1991 Mercury Cougar. It can take a novice mechanic much longer.
Take it to theglass repair guy
The 2001 Mercury Cougar does not contain Freon. Freon was banned in 1996. I suggest you take this vehicle to someone who has the knowledge, tools, and skill, to repair the A/C system.
a 95 mercuy cougar takes anywhere from 5 to 7 quarts of transmission fluid
For a Mercury Cougar , 2.5 litre V6 engine : According to the 1999 to 2002 Owner Guides : ( Motorcraft FL-820 engine oil filter )
Regular unleaded , 87 octane for the 2.0 and 2.5 engines in a 1999 Mercury Cougar according to the Owner Guide
The fuel pump on a mercury cougar is in the fuel tank. You are going to have to remove the fuel tank, take the lock ring off of the tank, and then pull the pump assembly out.
If it is a V6 about 6 Quarts with a new oil filter.
The Owner Guide for the 1999 Mercury Cougar shows ( 5.8 quarts with filter change ) for the 2.5 liter V6 engine
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 )