This week on The Best of Car Talk, can Adrienne use her Saab to deliver hundreds of pounds of rocks for her husband's birthday, or does Adrienne have rocks in her head? Elsewhere, Sarah's Taurus smells like waffles and maple syrup, so unless she spilled any IHOP leftovers down the vents, she may be shopping for a new engine or a new car. Also, Tracy and her dog both need help convincing her husband to use his brakes and abandon his "conservation of memomentum" theory; Jim's friends are trying to convince him his van wlll have an easier time starting if he turns on the lights before turning the key; Chris can spend a few hundred dollars to turn off his Mazda's EGR light or invest in official Click and Clack black tape; and Daniel Pinkwater weighs in on his Theory of Displaced Misery. All this and more, this week on The Best of Car Talk.