5 Best Penetrating Oil For Stuck Spark Plugs – Ultimate Guide

best penetrating oil for stuck spark plugs

Mostly people search for best penetrating oil for stuck spark plugs. A spark plug is used for an electric spark that ignites air and fuel mixture in a vehicle engine. A spark plug is the most essential component of a vehicle engine. The spark plug needs proper maintenance to work properly if you don’t keep it maintained, it a case of vehicle engine starting issues, and sometimes your vehicle engine turn-off during long drives.
The biggest problem a vehicle owner face is that the spark plug gets stuck in the vehicle engine if it not keep maintained. There are numerous cases in which spark plugs get stuck due to corrosion. Sometimes a faulty ignition coil case sparks to get fuse due to overheating of the engine. First of all keep your vehicle maintained and tuned, but if your vehicle spark plug gets stuck due to some other reason, you can remove it by using penetrating oil. In this article, I am going to show you some best penetrating oil for stuck spark plugs.

But there are some questions before choosing the best penetrating oil for stuck spark plugs.

What Factors should look before choosing a penetration oil?

There are some important factors to look at before buying a penetration oil. The most important factor is the penetrating power of penetrating oil. Penetrating oil base mineral lubricants such as fats or esters also contains extreme pressure additives, such as chlorine, phosphorus, and sulfur. But you can also make penetrating oil at home with a mixture of 90% vegetable oil and 10% acetone.

The penetrating power of penetrating depends on the mixture of solvents which depend on their brands. High-tech penetrating oil contains refrigerants instead of solvents. This absorbs the heat and decreases the temperature of the surface to freezing. The stock spark plug contracts and the surface lubricates with lubricant and this makes it easy to pull out the spark plug.

What can you spray down in a spark plug hole?

You can not spray anything in a spark plug hole because it can cause an engine to misfire. The best way to clean your vehicle spark plug hole is by using compressed air from an air gun or air spray.
If there is a coat of grime, you can use penetrating oil but be careful don’t use too much. When gunk dissolves in oil blow it away with compressed air and wipe the remaining liquid with a rag. The easy way is that attach a rag with a screwdriver and spray penetrating oil on it and clean the plug hole from the inside. Spray some WD-40 to dry the hole and replace the plug.

Can we use WD-40 except for penetrating oil for a stuck spark plug?

WD-40 is used to displace moisturize and provide light lubricant, In other words, it prevents corrosion. On the other hand, penetrating oil remove junk and rust and make spark plug easy to remove. But the answer is yes, you can use WD-40, but it is not the best choice, the best choice is penetrating oil to remove a stuck spark plug.

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These are some best penetrating oil for stuck spark plugs

Kano Kroil Penetrating Oil

Kano Kroil is one of the best penetrating oil for stuck spark plugs. It is made of a unique formula that removes rust and carbon without attacking metal and provides long-lasting protection. Its quick-action formula penetrates faster and deeper than other penetrating oil. Its unique formula attacks rust and grime which make spark plug easy to remove.

Pros & Cons

  • Much faster action than other penetrating oils.
  • Provides long-lasting protection.
  • Do not affect the metal.
  • A little bit more costly than other penetrating oils.

Free all Penetrating oil

Free All penetrating oil act as a rust-eating agent, it not only eat rust but also dissolve it. It is used to loosen red and white lead, tar, grease, carbon, and graphite deposits. Its also similar to Kroil penetrating oil but it mostly uses on the rusted area of the machine. It contains no silicones, making it safe in paint and shop environments.

Pros & Cons

  • Act as a rust-eating agent.
  • Contains no silicon which makes it safe for the shop environment.
  • Work on all kinds of rusted areas.
  • Little Bit Costly.
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PB B’laster 16-PB Penetrating Catalyst

PB B’laster quickly busts loose rusted or frozen parts caused by rust and corrosion and attacks rust from all angles using the unique capillary action. Its fast-acting formula contains non-evaporating lubricants that save time and equipments. It not only removes rust but also prevents machine parts from rusting in the future.

Pros & Cons

  • The formula contains non-evaporating lubricants that save time and equipment use and make the job easier.
  • Unique Capillary action attack rust from all angles.
  • Less effective on grime.

CRC Knock’er Loose Plus Penetrating Solvent

This is also one of the best penetrating oil for a stuck spark plug. Its unique formula drops the temperature of the metal and contracts the spark plug which makes it go deeper and work more efficiently than other penetrating oil. As you know sometimes pouring lubricants in spark plug hole cause the engine to misfire but this product is safe to use on electrical products.

Do not use this product on the paint, it can cause paint damage.

Pros & Cons

  • Safe to use on electrical products.
  • Deep Action formula.
  • Damage Paint.

Liquid Wrench Penetrating Oil

Liquid wrench penetrating oil contains a fast anti-seized formula that quickly frees stuck spark plugs and rusted nuts and bolts. It also provides rust protection for metal tools and machinery. It produces bubbles when you spray it after that it lefts a thin layer of lubricant.

Pros & Cons

  • The fast-acting formula works instantly.
  • Provides rust protection.
  • Little bit costly.

Which brand should you choose before buying a penetrating oil?

This a tough decision to choose one brand, the biggest difference between brands depends on how fast their product works. When I visit amazon for penetrating oil, I find most penetrating oil has a rating above 4.5, So it’s difficult to choose one of them.
Penetrating oil is a very simple product, Drexel University students found that a mixture of vegetable oil and acetone made a better penetration oil than brands. So you can make it at home by mixing 10% acetone and 90% vegetable oil without any chemistry degree. So keep in mind before buying a penetration oil always check reviews and questionaries, which help you to know more about a product like its action time and the main purpose for which the product is manufactured.

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