This week on Car Talk, Caroline's ex-boyfriends have labeled her a Clutch Killer. She's ignored their admonitions because, well, she was driving their cars. But, now she's got her own car, and first gear's getting a little jerky. Is she ready to face the music?  Meanwhile, family trouble may be brewing for Mac out in California. Mac's brother borrowed his truck, and while driving it, the hood flew open, and caused a few boat payments-worth of damage, for which Mac's brother didn't offer to help pay. Elsewhere, Adam's Maxima's windows are mysteriously descending overnight, and he can't blame his girlfriend anymore; Sarah broke up with her mechanic after two bad mistakes but is considering giving him another chance; and on Stump the Chumps we find out if Muriatic acid de-cemented Josh's Corolla. All this, and lots more, this week on Car Talk.