This week on The Best of Car Talk, Andy loves waxing his car, but his friends tell him he's wasting his time. Has paint technology made waxing passe, save for the mental health benefits? Elsewhere, Diane thinks her husband's claim that BMWs have a unique aroma is a bogus attempt to justify his mid-life crisis; Melissa traded her car to her ex-husband for a rifle and a skiff, but he thinks he got ripped off; and Ed's solution to a sticky shifter may give his insurance company an ulcer. Also, how one student's GPA plummeted after she listened to a single episode of Car Talk; and a new wieght loss plan that's guaranteed to work—the Geriatric Diet. All this and more, this week on The Best of Car Talk.