I'd like to name my new car...

I've been following Royall's blog, and I love how she and Matt name their vehicles...in fact, I'm not sure if you know this or not Royall, but Auntie Bev used to name her vehicles too. I remember Betsy and Nellie. I am getting my new car on Saturday and would like to be clever, and have a perfect name ready, but I can't even decide if it's a boy or a girl...something I could easily ask Jane and she would immediately be able to tell me, as she is highly gender sensitive. I'm leaning female though. So how does one determine these things? Any ideas? My favorite name for a pet is Rufus...I named all my cats in my life that same name, with the exception of one crazy kitten we had called Khoshi (Happy in Farsi). I'm tempted to call my new car Poppy in honor of my poppygirl...or if I'd had another girl I would have named her Hannah...and I still kind of like the name Yellow, from Sarra's baby name list. There's Heber, after my Christmas birdie that we no longer have thanks to Eli. I am open to ideas.