All I can think of is when you jacked it up (if you did jack it up) something happened with the tailpipe or muffler.

The oil is unrelated to the exhaust system. Or so far as I know...

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Semibodacious Transmogrifications a Specialty

1990 300D 2.5 Turbo sedan 171K (Rudolf)
1985 300D Turbo TD Wagon 219K (Remuda)

"Time flies like and arrow, yet fruit flies like a banana"
---Marx (Groucho)