SAE 5 W 30 - certified for gasoline engines
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
According to the 2000 Mercury Mountaineer Owner Guide : With engine oil filter change : Both the 4.0L SOHC V6 and the 5.0L V8 engines take : ( 5.0 U.S. quarts of 5W-30 )
You can view the 2000 Mercury Mountaineer owners manual online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides ( pages 238 and 239 will answer your question )
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
In a 1997 Mercury Mountaineer : r134a
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 1997 Mercury Mountaineer owners manual : Your 4R70W automatic transmission takes ( Motorcraft MERCON automatic transmission fluid ) * the type that is used should be engraved into your automatic transmission fluid level dipstick *
DOT ( 3 ) brake fluid , if that is what you are asking ?
For the 4.0 liter SOHC , V6 engine use ( 5W-30 engine oil ) For the 4.6 liter V8 engine use ( 5W-20 engine oil ) For the AWD transfer case ( and the 4X4 transfer case ) use Motorcraft MERCON automatic transmission fluid According to the 2004 Mercury Mountaineer Owner Guide
According to the 2005 Mercury Mountaineer Owner Guide : The 4.0 liter V6 engine takes ( 5W-30 ) The 4.6 liter V8 engine takes ( 5W-20 )
According to the 2002 Mercury Mountaineer Owner Guide : For the 4.0 liter SOHC , V6 engine ( 5W-30 ) For the 4.6 liter V8 engine ( 5W-20 )
Since the first model year of the Mercury Mountaineer is the 1997 model it would be ( r134a )