Dilbert wants a fuel-efficient car

From yesterday's Dilbert page-a-day calendar:

Dilbert and Dogbert, taking a walk.

Dilbert: I'm thinking about buying a more fuel efficient car.
Dogbert: Why?

Dilbert: It's my patriotic duty to reduce this country's dependence on foreign sources of oil.
Dogbert: Why?

Dilbert: Because then the countries that hate us will have less money to fund terrorists.
Dogbert: Actually, developing countries would buy the oil you saved, thus adequately funding those same terrorists.

Dilbert: At least I wouldn't be funding them myself.
Dogbert: Oil is a fungible commodity. the capitalist system virtually guarantees that you'll end up buying the lowest cost oil from sources unknown to you.

Dilbert: Well, maybe, but I want my car to make a statement.
Dogbert: And the statement would be "hey, everyone, I don't understand what fungible means!"

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