how to extend rental time
Determine how long you want to keep the car. Be specific -- the time difference between a morning and an evening return, for example, can affect the cost of extending the return. Step 2. Contact the rental agency from which you are borrowing the car. While most major agencies have toll-free national help lines, you may also call the specific pickup/drop-off location at the number on your rental agreement forms. Step 3. Explain that you wish to extend the return date on your rental car. Ask about any service fees that may apply, and what your new rate will be -- rental companies charge different rates on weekends, weekdays and holidays, and your rate for the extension may not be the same as it was originally.