According to the 1998 Mercury Mountaineer Owner Guide :
With engine oil filter change :
The 5.0 liter V8 engine takes ( 5.0 U.S. quarts of 5W-30 )
( 5 quarts ) with engine oil filter change for the 4.0 liter SOHC , V6 engine in a 2006 Mercury Mountaineer
According to the 2005 Mercury Mountaineer Owner Guide : With engine oil filter change : ( 6 quarts of engine oil ) for the 4.6 liter V8 engine
( 5 quarts ) with engine oil filter change
( 5 quarts ) with engine oil filter change
That would be the 4.6 liter engine, which takes six quarts. * of 5W-20 according to the 2003 Mercury Mountaineer Owner Guide
( 5 quarts ) with engine oil filter change
According to the 2000 Mercury Mountaineer Owner Guide : For the 4.0 litre V6 engine and the 5.0 litre V8 engine : With engine oil filter change : ( 5.0 US. quarts of 5W-30 )
According to the 2001 Mercury Mountaineer Owner Guide : With engine oil filter change : For the 4.0 liter SOHC , V6 engine ( 5.0 U.S. quarts of 5W-30 engine oil ) For the 5.0 liter V8 engine ( 5.0 U.S. quarts of 5W-20 engine oil )
More information please - what year ? what engine ?
According to the 2002 Mercury Mountaineer Owner Guide : With engine oil filter change : The 4.0 liter V6 engine takes ( 5.0 U.S. quarts of 5W-30 ) The 4.6 liter V8 engine takes ( 6.0 U.S. quarts of 5W-20 )
According to the 2000 Mercury Mountaineer owner manual : With engine oil filter change : The 5.0 L / 302 cubic inch V8 engine takes : ( 5.0 U.S. quarts of 5W-30 )
According to the 2004 Mercury mountaineer Owner Guide : With engine oil filter change : The 4.0 liter V6 takes ( 5.0 U.S. quarts of 5W-30 engine oil ) The 4.6 liter V8 takes ( 6.0 U.S. quarts of 5W-20 engine oil )