This week on The Best of Car Talk, Sarah thinks her husband and kids might have held a peeing contest in her minivan while she was away for the weekend. Will Tom and Ray find them innocent or guilty, and what was Sarah thinking by leaving them alone in the first place? Elsewhere, can three totaled Subarus combine to make one drivable one for Karen? Will John’s radiator hang on until he finishes grad school? And, why does Mike’s car die only on Sunday mornings? All this and more, this week on The Best of Car Talk.