Where is the oil drain plug on a Lincoln LS 6 cylinder

Misfire is almost always bad spark plug and/or ignition coil. I wouldnt trust an OBDII scanner to correctly diagnose which cylinder is misfiring. Your best bet is to replace the coils in all 8 cylinders (or 6 if its a V6) since when one goes out it makes the others work harder, meaning that they arent far behind

the coils act as the gasket but the valve covers can leak oil into the chamber for the sparkplugs and give driveability problems. there are gaskets for the valve covers that can correct this if you have oil in there. yes thye sparkplugs are in those recesses

Generally in a spark plug is 60000 kilometers, if fuel is bad need in early, remove the spark plug, such as for auburn or rust color, spark plug showed normal; Such as stained with oil, shows that the spark plug gap imbalance or too much oil, high tension line short circuit or open circuit; Such as black smoke, spark plug type cold wrong or mixture is thick, the oil is up; Such as the top between the electrode and sediment, when for the oily sediment, shows that the cylinder into the oil has nothing to do with the spark plug, when the black sediment, spark plug carbon deposition and bypass, when grey sediments, is a gasoline additive covered electrode lead to lack of fire; If serious erosion, such as the scar at the top, with black pattern, electrode melt, showed that the spark plug is damaged.
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It sounds like you need a coil for # 6 cylinder .LS's have a issue with the valve cover seals leaking oil into the spark plug holes and causing a misfire if this is the case you have to replace all the gaskets for the valve covers clean out the oil and might as well do sparkplugs then too. Its more of a dealer repair then. If no oil in that cylinder try replacing coil and spark plug.

Most likely a shorted coil on that cylinder.
The ls is bad about letting oil leak around the spark plug then the oil shorts out the coil.
I have an ls and it is a black hole for repair costs.

Good luck Lincoln Brother

It is on the bottom of the oil pan,just like every other vehicle ever made V8 is at back on pass side.

YES.

A bad coil pack can foul out the spark plugs. I have also been told the computer might need to be reset for around $100. You must use Motorcraft OE plugs for this car to run at its best is what my mechanic told me.

Lincoln 2002 LS

The cylinder order layout will look like this diagram.

+-------------------------------------------------+
| | |
| Passenger Side | Driver Side |
|-------------------------------------------------- |
| 4 8 |
| 3 7 |
| 2 6 |
| 1 5 |
+--------------------------------------------------+
Front of car.