A: I think my car needs an oil change. B: Why don't you go buy the oil and do it yourself? A: I am not familiar with the process. B: I can teach you to do it, if you'd like. A: I'd be grateful if you did. B: How about next week? A: That is too long from now. B: Can you do it sometime this week? A: I have too much work to do this week. B: Then maybe you should take it to the mechanic. A: Where can I find one nearby? B: Look it up in the yellow pages, or even online.