PC# 155046 is good for a free rental day (class B, C, D, F or G). I have several that are earned as President's Circle (I think it is every 10 rentals gives me one free day). I am not sure if Five Star also has this or not.

NOTE: You must have the certificate when you use this PC code and it will be asked for at time of rental, unless Gold, in which it will be asked for upon return of vehicle.