Do you want insurance driving a car other than yours? If you drive someone else’s car, you invite trouble with a capital T. You can buy car insurance for non car owners but you can’t purchase insurance for that car. Car owner must do it because companies allow only owners to insure their vehicle.
Drivers behind the wheel must have their name on documents insuring the car and have non-owner's insurance.
So get listed for insurance coverage driving someone else's car!