I have a great blinker fluid story for you....hold on, Bruce lee is about to kick some ass...back to the story..
Many years ago. In a town Far Far away a budding Mark 8 owner worked at a Jiffy Lube. A common joke was to yell up at the guy upstairs and tell him things like the blinker fluid or muffler fluid needed to be changed. One time, a young 16 year old kid (not me) believed this and tried to sell the customer blinker fluid. This customer was PISSED OFF and the owner happened to be their that day. and he was an owner who took his business seriously. This customer laid into the onner about why his people thought he was some sucker. Man, I never saw a boss sooo angry.