Depends on the scenario. Let's say you are driving an older car which you own outright.
Let's say you have $100 a month in maintenance (averaged - tire replacement, oil changes, things breaking), plus registration of $100 a year, plus depreciation of the asset, plus insurance, plus the mileage benefit of driving a newer more fuel efficient car. Plus - if something happens you have no deductible on insurance - you can just return the car!
Especially if you have at fault/tickets on ur history insurance can be expensive.
All this vs. renting from Enterprise at $100 a week incl. taxes etc and using a CC for insurance.
Perhaps leasing is the middle ground.
Does anyone have some real numbers to play with?