Presumably by 5% utilization you mean by time. But the main depreciation factor on owning your car, aside from driving off the lot, is miles driven. If your car

Presumably by 5% utilization you mean by time. But the main depreciation factor on owning your car, aside from driving off the lot, is miles driven. If your car were driven 50% of the time with the kind of street/highway blend of mileage typical of a taxi, it wouldn't last nearly as long and your insurance and maintenance costs would be far higher.