a penguin drives into a mechanics and says "my car is leaking oil - can you have a look at it"?

The mechanic says "sure, Itll take about half an hour". 

The penguin wanders off to waste some time.  Does some shopping, goes to maccas, and on the way back stops at an ice cream parlour.

When he gets back to the workshop the mechanic says.  "I looked at your rear main - it looks like you've blown a seal".

"Naaa" says the pengin wiping his face,  "Its just ice cream."

:)