Man behind the counter: Hello there. How can we help you? Blonde: I'd like some 710. Man: Some what? Blonde: 710. Man: Uhmm... (checks computer) No, we don't have that, and I don't even have a listing. What kind of car do you have? Blonde: A 1996 Geo Metro. Man: Where do you put the 710? I've never heard of a product. Blonde: In the engine. Man: This I have to see. Is your car here? Blonde: Yes, right out front. Man: Let's go take a look. So they get out to the car, and the blonde pops the hood, and after a few seconds, the man bursts out laughing. Find out why he laughed.