According to the 1999 Mercury Cougar Owner Guide ( 5W-30 )
With engine oil filter change :
The 2.0 litre four cylinder engine takes ( 4.5 US. quarts of 5W-30 )
The 2.5 litre V6 engine takes ( 5.8 US. quarts of 5W-30 )
R134a
It is kind of weird but the fluid goes into where the transmission dipstick comes out of. Just get a long skinny funnel.
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
Regular unleaded , 87 octane for the 2.0 and 2.5 engines in a 1999 Mercury Cougar according to the Owner Guide
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 )
R134a
Yes , on a 1999 Mercury Cougar : The fuse box is under the dash to the left of the steering wheel , apparently there is some kind of release that allows the fuse box to swing down exposing the fuses Also , the power distribution box ( which is " live " ) is located in the engine compartment on the drivers side of the engine compartment
premium engine oil
mercury cougar
It came from the factory with ( 5W-30 )
Use Super Premium SAE 5W-20
It is on the passenger side faceing the drivers side. Kind of hidden in a compartment. Slide the cover open next to the orange button. Press the button to eject.