Grooves Between Tire Treads
Did you know these indents all over your tires do something other than leave a cool mark when you drive over a patch of snow? They actually serve a pretty important purpose: the lowest point in these grooves represents the lowest point your tire should ever get. For example, if your tires are smooth and you see no grooves, you should definitely replace them as soon as possible!
Grooves Between Tire Treads
Gas Pump Latch
The weird latch on a gas pump can actually make your life easier. How? If you lock the latch between the grooves of the gas pump handle, you can walk away from the pump and still put gas into your car! Now you do not need to stand there while holding the gas pump in place as you refuel your car. Of course, if you want to, you can. It is a free country, after all.
Gas Pump Latch