Can I claim the interest on a car title loan as interest paid on your car in the self employed business section?

You can claim the percentage used for business. For example, if your car is used 50% for business, then 50% of the interest would be deductible.  

Reference: Business Use of Vehicles - TurboTax Tax Tips & Videos - Intuit

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@AmyC wrote:

You can claim the percentage used for business. For example, if your car is used 50% for business, then 50% of the interest would be deductible.  

 

Reference: Business Use of Vehicles - TurboTax Tax Tips & Videos - Intuit

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However, the purpose of the loan must be for the business.  If you take out a loan for personal expenses, the interest is not a deductible business expense, even if it is secured by a business vehicle.  

To be deductible, business expenses must be ordinary and necessary expenses of the business.