South Carolina Automobile Taxes

For 2007, I used my car for about 70% business, 30% personal – What can I write-off?
I was an independent contractor in South Carolina, doing food sampling at grocery stores. What automobile expenses could I write off on my taxes?
BTW – Yes, I kept I mileage log.
70% as long as you have written records to substantiate the business usage, i.e. mileage logs.
(What Happens If I Dont Pay For Insurance On My Vehicle)