This week on Car Talk, Sharon's been experiencing a series of bad hair days when she drives long distances. Unfortunately, she couldn't get through to "Follicle Talk," so she's turned to Tom and Ray. Can they stop laughing long enough to offer any useful advice? Elsewhere, Rick has a long list of reasons to justify adding a supercharger to his Miata, and they're all bad; Doug's wife thinks the burning smell in his truck is dead bugs, and since he told her she's nuts, he's hoping it's anything else; and, Jon's mechanic is learning a lot about Jon's Accord--except how to fix it. All this, and lots more, this week on Car Talk.