2011 Corvette factory issued owner’s portfolio has been developed by the OEM to give vehicle owners a basic understanding of the operation of their vehicle. Portfolio provides recommended oil for your vehicle, gas tank capacity, clock and radio setting, information about vital fluids, tires, routine maintenance and specific options your vehicle is equipped with. Contains information on the proper operation and care of the vehicle. Our GM original Owner’s Portfolio includes factory Maintenance Schedule. Option specific supplements cover certain vehicles and contain information describing the operation of these options.