There are ( 2 EXHAUST MANIFOLDS ) on your 1993 Mercury Villager 3.0 liter V6 engine
without oil filter 3.7 quarts with oil filter 4.2 quarts
I assume it is the same as the ( 1996 ) Mercury Villager : With engine oil filter change : ( 4.2 US. quarts of 5W-30 engine oil )
I looked at the Mercury Villager Owner Guides from ( 1996 , 1999 , and 2002 ) With engine oil filter change : Each Owner Guide shows ( 4.2 U.S. quarts )
According to the 2001 Mercury Villager Owner Guide : For the 3.3 liter V6 engine : With engine oil filter change : ( 4.2 US. quarts of 5W-30 engine oil )
20.0 gallons for Mercury Villagers '93-'98.
Check the owners manual or visit a shop/dealership.
According to a website I was looking at : For the 1993 Mercury Villager , 3.0 liter V6 engine , front wheel drive : ( 16 city / 21 highway miles per US. gallon )
The 1994 Mercury Villager has a 3.0 litre V6 engine from the factory : ( it has 6 engine cylinders )