It uses R134 refrigerant.
On a 1997 Mercury Mountaineer : ( 5W-30 ) for the 5.0 liter / 302 cubic inch V8 ( with filter change , 5.0 U.S. quarts / 4.7 litres of engine oil ) According to the Owner Guide
Dex cool coolant.
In a 1999 Mercury Mountaineer : Either the 4.0 liter Single Over Head Cam ( SOHC ) V6 engine , or the 5.0 liter V8 , which is an over head valve / push rod design engine
dex - cool orange coolant ,any coolant flush
Green.
Motorcraft Premium Engine Coolant ( green color ) or Motorcraft Premium Gold Engine Coolant ( yellow color ) Use the color that came in your vehicle or is in it now
It uses regular green coolent
Your 1997 Mercury Mountaineer came from the factory with ( Motorcraft MERCON automatic transmission fluid ) in your 4R70W automatic transmission ( the type that you are supposed to use should be engraved in your automatic transmission fluid dipstick just to confirm )
According to the 2000 Mercury Mountaineer Owner Guide : Both the 4.0 liter V6 engine and the 5.0 liter V8 engine came from the factory with ( Motorcraft SAE 5W-30 engine oil ) " normal " engine oil
On a 1997 Ford Expedition : The 4.6 liter V8 engine uses ( 4R70W ) The 5.4 liter V8 engine uses ( E4OD )
4R70W with the 4.6 liter engine E4OD with the 5.4 liter engine
The 4.0 liter V6 engine takes 5 U.S. quarts of ( 5W-30 ) The 4.6 liter V8 engine takes 6 quarts of ( 5W-20 )