The 2001 Mercury Mountaineer Owner Guide shows :
For the FRONT AXLE :
( Motorcraft SAE 80W-90 Premium Rear Axle Lubricant )
* 1.8 U.S. quarts
" regular " unleaded - 87 octane
( 5 w 30 ) for the 4.0 L - V6 and the 5.0 L - V8 engines , according to the 1999 Mercury Mountaineer owners manual
Motor oil type shold be chosen based on where you live not the type of car you drive. If by type you are refering to grade of oil. If by type you mean brand then it does not matter as long as it has an SAE approved symbol all motor oils are the same per grade. Addatives in motor oil make them different not the brand.
5w 30
No dummy Pluto is and im in 6th grade!
According to the 2000 Mercury Mystique Owner Guide ( 5W-30 )
one may take more or less oil but high is better
Motorcraft MERCON automatic transmission fluid is used in the transfer case for the 4x4 and all wheel drive systems
" regular " unleaded , 87 octane
I think that you should be in sixth grade when you get to sit in the front seat.
The 1923 Mercury dime is a common date coin, average circulated coins are $4.00-$7.00, better grade are $15.00-$30.00.
Give your grade level in the question.