Since it's a car loan, it's over in the installment loan slice of the credit pie chart. It isn't doing anything with your revolving util anyway.
To clarify, all closed TL's should keep reporting for 10 years after the date that you close them. Any baddies that are on them will show for 7 years from the time that they happened, and then fall off. So if you have a late from May 2006, and you sell the car in January 2008, the history will remain until January 2018, and the late will fall off in May 2013, leaving four and a half years of clean history.
More and more CCC's seem to be deleting entire TL's when you goodwill them. So with minor baddies on closed accounts, you might be doing better just to wait for them to go away on their own, and not risk losing the entire history.
* Credit is a wonderful servant, but a terrible master. * Who's the boss --you or your credit?
FICO's: EQ 781 - TU 793 - EX 779 (from PSECU) - Done credit hunting; having fun with credit gardening. - EQ 590 on 5/14/2007