RAY: Every morning on his way to work, Billy Bob Beaumont stops at the corner gas station and spends $.25 for gas. Every evening on his way home, he stops at the same station and again spends $.25 for gas. He continues this pattern for some months. The amount he spends never varies. Nor does the twice-a-day schedule.
Finally the attendant, who has observed Billy Bob's routine says, "You know, if you'd spend about $10 on a repair, you wouldn't have to stop here so often."
What is the simple repair the attendant has in mind? And the hint, which I have to give, is that it has nothing to do with the fuel system.