Hi All
I have a recently purchased 9-3 S Convertible with the HOT engine. I noticed on my garage floor that there are particles of soot...blown out of the exhaust at starting the engine. The chrome exhaust tip is black now too...does it sound like I have a problem or is this to be expected.
I am running on straight unleaded rather than premium unleaded fuel - will that be relevant?
Thanks In advance for your help, DAN