According to the 2007 Mercury Mountaineer Owner Guide : ( the fuel tank capacity is 22.5 U.S. gallons )
Look under the vehicle and count them.
There are two head gaskets in the V 8 1999 mercury mountaineer
the four door speakers are 6x8 and the sob if you have one is 8"
According to the 2004 Mercury Mountaineer Owner Guide : ( 22.5 U.S. gallons )
According to the 2000 Mercury Mountaineer Owner Guide : ( the gas tank holds 21.0 U.S. gallons )
I believe it has ( 2 ) because the ignition system is EDIS ( Electronic Distributorless Ignition System ) on the 2002 Mercury Mountaineer V8
5 quarts, 5w30
( 5 quarts ) with engine oil filter change for the 4.0 liter SOHC , V6 engine in a 2006 Mercury Mountaineer