Your rental rates are accurate, but the cost of ownership is way more than $0.10 per mile. For that to be true, you'd have to pay $20K for the average car (the

Your rental rates are accurate, but the cost of ownership is way more than $0.10 per mile. For that to be true, you'd have to pay $20K for the average car (the average is higher), drive it for 200,000 miles, and that doesn't count maintenance, insurance, or gas. Realistic costs are far closer to the $0.55 a mile that the IRS uses to calculate the mileage tax deduction.