A vacationing penguin ...
A vacationing penguin is driving through Arizona and sees that the car's oil-pressure light is on. He gets out looking and sees oil dripping out of the motor. He drives slowly and carefully to the nearest town and stops at the first gas station.
After dropping the car off, the penguin goes for a walk around town. He sees an ice cream shop, and being a penguin in Arizona, decides that something cold would really hit the spot. He gets a big dish of vanilla ice cream and sits down to eat. Having no hands, he makes a real mess trying to eat with his little flippers.
After finishing his ice cream, he goes back to the gas station and asks the mechanic if he's found the problem.
The mechanic looks up from the engine and says, "It looks like you've blown a seal."
"No, no," the penguin replies, wiping his mouth, "it's just ice cream."
[Thanks to Guy for passing on the gag - had me in stitches]