DO NOT put oil in the radiator :
The engine cooling system for the 2001 Lincoln LS came from the factory with
a 50 / 50 mix of distilled water and GREEN color antifreeze ( meeting Ford
specification ESE-M97B44-A )
* also , the hydraulic engine cooling fan fluid reservoir takes MERCON automatic Transmission Fluid
The 2001 Lincoln Navigator has double overhead cam (DOHC).
The 2001 Lincoln Town Car Owner Guide shows ( 5W-20 )
The raiator is a type of system where all fluid is added to the reservoir instead of the radiator directly, look for the reservoir and you will have found your radiator cap.
134a
Use only premium gas (*high octane) in the Lincoln LS.
5w30
Red, five year, hoat type.
The radiator drain plug should be close to the bottom of the radiator facing the engine. It could be a wing nut, or could be the type that is turned by a ratchet and extension.
chances are you have a blown head gasket.....that's about the only thing that can cause an oil type substance in your radiator......check your oil fill cap and area where the cap goes for a white foamy or creamy substance, if this is there that's your trouble
Mercon V
Intercooler just refers to the radiator type device that cools the air that goes into the turbecharger.
Usually at the engine end of the upper radiator hose in a bolt on type housing