A blonde went to a car spare parts shop and said, " I want a 710."
Both the sales people looked blankly at her. They'd never heard of anything like a 710.
They called to someone in the back, "Fred, this lady is asking for a 710!"
Fred had never heard of one either.
In an effort to help her, Fred took her to his car and lifted the bonnet, and there she pointed to the cap on the main engine block.
Written in bold letters on it was the word "OIL"!