Checking your Mustang Engine Oil Level is a critical part of routine maintenance. The Mustang Engine Oil Dipstick allows you to see at a glance the condition & level of your Mustang Engine Oil. Of course a Mustang Dipstick is nothing without its proper Mustang Dipstick Tube! The Dipstick Tube houses the Dipstick & seals off the Dipstick to the Engine Block, Oil Pan, or Timing Cover.