Insane Japanese WD-40 Tricks Dealers Don't Want You To Know

That blue and yellow can in your garage can do a lot more than quiet a squeaky door. Used the right way, it can save you a tow truck, a frozen lock, a seized bolt, and a few hundred dollars in shop fees. Used the wrong way, it can cost you a whole lot more. One of these tricks has gotten cars running on a rainy morning when the owner was about to buy a part he didn't need. Another starts with this can and ends with a cheap homemade mix that beat every product on the shelf in a real workshop test. And there are a few places on your car where most people spray it without thinking, and every one of them is a mistake. After forty years in the shop, I'm counting down twelve ways to use it right, plus the spots it should never go near. All you need is the four-dollar can you probably already own.