What is the best homemade WD-40?

Author: Annetta Howe  |  Last update: Sunday, May 31, 2026

A team at Drexel University in Philly conducted side-by-side comparison tests of vegetable oil mixtures, WD-40 and automatic transmission fluid, and found that a mixture of vegetable oil with 10 percent acetone works as well to free rusted bolts as WD-40. And it costs about one-tenth of the price.

What is the best mixture for penetrating oil?

Tests reveal that a mixture of vegetable oil with 10 percent acetone, found in nail polish remover and paint thinners, works as well to free rusted bolts as WD 40. And it costs about one-tenth of the price. WD 40 lubricating spray may have some low-cost, do-it-yourself competition: vegetable oil and acetone.

What is a good substitute for WD-40?

A study at Drexel University found that a mixture of 90% vegetable oil and 10% acetone works better than WD-40.

What is the main ingredient in WD-40?

<35% petroleum base oil (non-hazardous heavy paraffins) <25% aliphatic hydrocarbons (same CAS number as the first item, but flammable) 2–3% carbon dioxide (propellant)

Can I use olive oil instead of WD-40?

Yes, you can use oil as a substitute for WD-40 in some situations, but there are important differences to consider: Lubrication: Oil can provide lubrication similar to WD-40, but it may not penetrate as well as WD-40 does. If you're trying to loosen rusted parts, WD-40 is designed to penetrate and help free them up.

Grandpa's 40 Clever WD-40 Hacks You Didn't Know Worked

What is the best homemade WD-40?

Vegetable oil with five percent acetone works. Increasing the acetone to 10 percent or up to 30 percent boosts performance. At higher concentrations, you can free the seized bolt using less than half of the force that it takes with WD-40.

How to stop a squeaky door without WD-40?

8 Lubricants For Squeaky Door Hinges
  1. Bar Soap. Bar soaps contain fats and oils (such as palm and coconut) that will help lubricate those squeaky hinges. ...
  2. Olive Oil. Olive oil is a simple solution for fixing squeaking hinges. ...
  3. Petroleum Jelly. ...
  4. Paraffin Candles. ...
  5. GT85. ...
  6. Silicone Spray. ...
  7. Lithium Grease.

What is the human equivalent of WD-40?

If one requires WD40 then Depo-medrone by injection into the painful joints can be beneficial but often short-term. Into the hip with a very long needle needs to be injected under GA.

What does WD-40 do to your body?

Signs and Symptoms of Exposure: Harmful or fatal if swallowed. Aspiration of liquid into the lungs during swallowing or vomiting may cause lung damage. May cause eye and respiratory irritation. Inhalation of mists or vapors may cause drowsiness, dizziness and other nervous system effects.

What was WD-40 originally made for?

WD-40 was invented in San Diego in 1953 as a rust-prevention solvent for Atlas missile outer skins. A chemist at the Rocket Chemical Company created a compound that would prevent rust and corrosion on the Atlas.

What is the best lubricant for rubber on metal?

As mentioned above, and unlike lithium grease, silicone lubricant is the perfect lubricant for rubber surfaces, but it is also extremely versatile, so it can be used on most other materials, including metal, plastic, wood, and even painted materials.

When not to use white lithium grease?

It's not advisable to use them on plastic parts. As lithium is based on petroleum, it tends to speed up the decay of rubber and plastic components. Lithium-based grease can withstand high temperatures and are perfect for cars, heavy machinery, and guns.

What is the WD-40 trick?

Cut down on snow shoveling time with this neat trick: Spray the original WD-40 formula on both sides of your shovel before you start. Watch snow, ice and slush slide off the surface. No more stopping every few steps to dislodge built-up snow from your shovel.

How to make homemade penetrating oil?

In this bottle mix a 50/50 mix of 100% acetone and dextron/mercron automatic transmission fluid. The two fluids will separate like oil and vinegar so you have to shake the bottle well before spraying. I mixed up a batch and let it soak for 15 minutes on the rotor and with a few taps it came right off.

What should you not use WD-40 on?

7 places to never use WD-40 — you'll be surprised
  • Hinges. (Image credit: Shutterstock) ...
  • Bike chains. (Image credit: Shutterstock) ...
  • Locks. (Image credit: Shutterstock) ...
  • Polycarbonate and clear polystyrene plastic. ...
  • Sensitive electronics. ...
  • Wax polishes and some wax coatings. ...
  • Anything that comes into contact with food.

Why do people use WD-40 and toilet?

Why People Turn to WD-40 for Toilet Cleaning. WD-40 is known for its lubricating and water-repelling properties. Some swear by it for removing mineral buildup and tough stains in toilets.

Does WD-40 attract fish?

Fact: Consumers have told us over the years that they have caught some of the biggest fish ever after protecting their fish hooks and lures with WD-40®. We believe this legend came from folks assuming that the product must contain fish oil since it appears to attract fish. Sorry Charlie®, it just ain't so.

Does NASA use WD-40?

WD-40 was originally used by NASA to prevent rust and corrosion on spacecraft that launched the first satellites into orbit. It was invented by Georgia Tech engineering graduate Reginald Fleet and a team of scientists, and today only a handful of people still know the exact formula.

What is a natural WD-40?

Vegetable Oil

This pantry staple is another lubricant alternative to WD-40 that can be easily applied without having to purchase another product. Mostly any cooking oil can be used, and vegetable oil has the added perk of being safe to use on most surfaces, including metal and plastic.

What does a WD-40 imitate?

The WD-40 is another simple pattern meant to imitate midge pupae and Baetis nymphs. I believe it originated somewhere in Southern Colorado and was popularized on the San Juan River in New Mexico.

Why does the bottom of my shoes squeak when I walk?

Moisture trapped inside the shoe will cause a squeak until it is fully dried out. Points of friction between the shoe's insole and sole can cause a squeak, as well as wearing shoes barefoot. Leather shoes can squeak when they are too dry and need to be conditioned or if the laces are rubbing against the tongue.

What is a natural lubricant for squeaky doors?

Olive Oil. Our first lubrication option is olive oil, which most people have sitting in their kitchen cabinets. Olive oil is a substance that's more than able to take care of creaky or squeaky hinges due to its viscous nature.

Where do you spray WD-40 on a door?

Positioning the end of the smart straw about an inch away, spray in short bursts along the hinge, making sure to hit the hinge pin and any seams so that the WD-40 can travel down into the hinge itself.

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