Remember Rebecca from a few weeks ago, whose anal-retentive dad insisted she keep detailed records of her gas mileage in his book? This week, Dad has his say. Topher explains the book's origins in a Datsun 510, and what it will take for Rebecca to free herself from book duty. Elsewhere, Scott may have to decide whether he wants to be right or be happy, as he and his wife disagree on how to use their truck's 4-wheel drive; Art's wife drove home from an oil change missing one small ingredient—the oil; and Judy's getting good at holding up her car's hatchback with her head, but would like to get it to stay up on its own. And, what happens when a computer traffic model tries to understand Boston drivers? All this and lots more, this week on The Best of Car Talk.