Pencil (ENGINE) zincs prevent overheating, engine burnout.
U.S.Patent for sale or license to mfg.
Owner well above retirement age.
Impossible for this product to fall into cooling system causeing
overheating as all other similar zincs can.
Which one would you use, the one that causes overheating,
or the one that prevents overheating???
Check F A Q s on the website.