I changed out the spark plugs. Was able to get the car started. Here is what I noticed:
- engine still misfiring/running rough
- oil is becoming milky/tan looking. Some small air bubbles appearing.
- heavy steam coming from the exhaust.

Looks like I have a blown head gasket to fix. I have a ...

Here is a run-down of the how my s40 got to where it is:
- Car was starting/running fine - no issues
- Used s40 to jumpstart another car I was looking to buy. Accidentally crossed the jumper cables on the car I was jumping. Completely drained the battery on my s40. Was able to jump start the s40 and ...