When I was in high school, one of my prettiest classmates asked me to have a look at her car. It was running badly on the way to school and now it wouldn't start.
I got in the car and before I turned the key I noticed a little paper rectangle taped to the dash.
Over the oil light! I asked her why it was there and she told me the light had been flashing on and off for quite a while but got so annoying she just covered it up.
(Yes, she was blonde, but that's not the point.) 