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
According to the 1996 Mercury Cougar Owner Guide : ( 18.0 US. gallons )
The ( 1996 ) Mercury Cougar gas tank capacity is ( 18.0 U.S. gallons )
The ( 1996 ) Mercury Cougar gas tank capacity is ( 18.0 U.S. gallons )
check your owners manual?
A ( 1996 ) Mercury Cougar gas tank capacity is ( 18.0 U.S. gallons )
I pretty sure your looking at 5 with the filter.
The Owner Guide for the 1999 Mercury Cougar shows ( 5.8 quarts with filter change ) for the 2.5 liter V6 engine
You can find a front door latch assembly diagram, for your 1996, Mercury Cougar from the manufacturer website. Many auto-parts websites will have the diagram.
Recommended amount is 5 and a half quarts of 5W20=========================================According to the 2000 Mercury Cougar Owner Guide :With engine oil filter change :If you have the 2.5 litre V6 engine , but it indicates 5W-30For the 2.0 L four cylinder ( 4.5 quarts ) of 5W-30
I'm assuming it is the same as the ( 1996 ) model year of Mercury Cougar : ( there are 5 lug nuts for each wheel / total of 20 )
According to the 1996 Mercury Grand Marquis Owner Guide : With engine oil filter change : *( 5 quarts ) * engine oil dipstick is used to determine the fill amount
For a 2000 Mercury Cougar : The tank holds ( 15.4 US. gallons )