This week on The Best of Car Talk, Carl is about to receive his Master's degree in Coastal Management and is wracked with guilt about owning two gas guzzling SUVs. Will converting emissions systems help him feel better and keep the seas at bay? Elsewhere, Brian's drive to work is quicker and more scenic than his wife's, but on washboard roads, so is he going to spend all that saved time in his mechanic's lobby waiting for a new suspension? Also, Dr. Kenny is so concerned about his Civic's brakes that he's stepping out of surgery to seek help; Debbie's mechanic found a rag stuck in the remains of her Peugeot's oil filter; and Monica's husband insists on shifting his automatic transmission into neutral at stop lights to let the transmission rest. Does his brain need a nap? All this and more, this week on The Best of Car Talk.