It is easiest removed from the top.
check the front of the engine at the bottom for an electrical plug
According to one of the Ford websites : For a 1993 Ford Taurus : 3.0 liter " Vulcan " V6 engine and 3.8 liter V6 engine ( Motorcraft FL-400-S engine oil filter )
from in the trunk behind the carpet
You remove it out the top.
on the bottom side of the engine.
remove tire. remove bottom mount. pullout through bottom.
The radiator plug can be located on the bottom of the radiator. The plug can be removed with a half inch ratchet.
Remove the crossmember and drop it out the bottom no problem.
Get a manual on your car from DISCOUNTAUTOREPAIRMANUALS.COM. there are many seals and some have to be done with the engine out.
fordparts.com shows ( .054 inch )
The 1993 Nissan oil sending unit is located on the bottom of the engine inside of the oil pan. You will need to remove the oil pan in order to view the sending unit.
I believe that would be the 3.2 liter DOHC V6 engine that was used with the automatic( from 1993 to 1995 inclusive ) unless you mean the 2010 Taurus SHO with the 3.5 L -V6 - twin turbo engine