Expenses for Travel
You can deduct ordinary and necessary auto and travel expenses related to your rental activities, including 50% of mean expenses incurred while traveling away from home. You generally can either deduct your actual expenses or take the standard mileage rate. You must use actual expenses if you used more than four vehicles simultaneously in your rental activities (as in fleet operations). You cannot use actual expenses for a leased vehicle if you previously used the standard mileage rate for that vehicle.
You can use the standard mileage rate only if:
For more information, see the Instructions for the Schedule E from the IRS Web site.