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its is very nice sized.i have 3 12in subs, 2 amps , oil and coolant, and misc.. and i still have plent of room for a decent sized suitcase..
On a 1991 Mercury Cougar : The oil pump is INSIDE the oil pan ( the oil pan is bolted to the bottom of the engine )
According to the 1996 Mercury Cougar Owner Guide : With engine oil filter change : The 3.8 liter V6 engine takes ( 5.3 US. quarts , 5W-30 PREFERRED ) * the engine oil level dipstick is used to determine the exact fill requirement
I'm assuming it is the same as the ( 1996 ) Mercury Cougar 4.6 liter V8 : With engine oil filter change : ( 5.0 U.S. quarts should put you almost to the full mark )
According to the 1996 Mercury Cougar Owner Guide : ( 5W-30 engine oil is the PREFERRED oil forthe 4.6 liter V8 and 3.8 liter V6 ) * with engine oil filter change , 5.3 U.S. quarts / 5.0 liters of 5W-30 , the engine oil dipstick is used to determine the exact fill requirement
You probably have a bad head gasket on your engine.
5w 20 ======================================================== The above answer of 5W-20 is correct if it is a 2001 or 2002 model year according to the Mercury Cougar Owner Guides ( 1996 , 1997 , 1999 , 2000 guides show 5W-30 from the factory )
5w30
5w 30
near the oil filter
with your eyes
Mercon V