My air filter has about 5000 miles on it and looks clean.
Kevin, to be clear, I am not billowing black smoke. It is just a little puff on initial acceleration, as I continue to accelerate, I see no smoke, at a steady power setting I see no smoke. I have seen this little puff from day one with my 2003, and previously thoughout my ownership of a 2001. I just see more now than before.
From your statement, I read that ANY black smoke is abnormal. As a fleet operator, I am inclined to listen to what you say.
John & Janene Browder
Knoxville, TN
2008 Marathon H3-3S