I just turned 31 so you are double my age but I would NOT say you are old at all.
I would say you have had double the fun and double the steering wheel time, you have double the wrench time, double the goodness in you, double the fabo fun.
So I would not say you are old at all, I would say you are double blessed to have double the earth time. God bless you and hope you have many many more miles ahead because you are only as old as you want to be, and double sweet if you want to be. :)