Is Gear Oil Flammable? 

This article will answer the question, “is gear oil flammable”? It also covers several topics about gear oil benefits, their properties, and the precautions for safely handling gear oil.

Is Gear Oil Flammable?

Yes. Gear oil is flammable. Any oil will catch fire if the temperature is high enough. The flash point varies considerably across different kinds of oil. 

What is Gear Oil?

Lubrication of the components of an automatic gearbox is accomplished with the use of gear oil. To prevent any details from being damaged very rapidly when they rub against one another, this design ensures that there are no components that are easily harmed.

Unfortunately, because changing this oil takes far longer than changing the engine oil, many people neglect to change it. Because it is not quickly damaged by heat like engine oil, oil requires a significant amount of time to be changed.

Because the axle box has situated some distance from the combustion chamber, the oil contained within it is protected from the potentially damaging effects of heat. More specifically, the use and dirt or water getting in through the CVT hose caused damage to the axle oil.

When the oil is rendered incapable of performing its function, the viscosity level will begin to fall. In addition, as a result of the dust and debris that gets into the oil, the color of the oil will transform into a milk chocolate hue.

If the oil has become contaminated, replacing it will involve draining to ensure that every component is free of any trace of dirt, dust, or even mud, which can be particularly hard to remove. 

After some time, after the old oil has been changed out with new oil, its performance will improve as it did before.

Gear oil primarily protects the CVT (Continuously Variable Transmission) transmission components by acting as a protective covering. Automatic transmissions necessitate a protective coating that can resist their high-performance demands.

Having oil in the automatic motor transmission system improves the smoothness of the action since gear changes are made automatically in this system. The transmission’s performance will be enhanced as a result. The motorist will be able to alter their speed as needed safely.

Gear oil has three primary purposes: 

  • The first is to lubricate and clean the gear transmission
  • The second is to protect against friction and wear
  • The third is to prevent damage caused by metal-on-metal contact
  • As a coating for loads that can be categorized as high in terms of both pressure and performance

What Are the Properties of Good Gear Oil?

Select either an oil that is resistant to heat or oxidation

Because of the scratches, one of gear oil’s primary tasks is retaining heat, which is also one of its functions. Gear oil needs to be able to endure high temperatures.

Determine the Appropriate Level of Thickness

When it comes to protecting gears from damage, gear oil with a high viscosity level is typically the most effective. When the engine’s temperature drops, the oil’s viscosity can rise, weakening the oil’s fluid qualities.

What Are the Safety Precautions for Gear Oil?

The safety precautions for gear oil are:

  • Training and education are essential for operators.
  • Ventilation should be adequate.
  • Wearing the proper personal protection equipment (PPE) is essential to avoid harm.
  • A spark or an open flame can all serve as sources of ignition. Therefore, avoid them all at all costs.
  • Near the gear oil source, smoking is strictly prohibited.
  • Restrict access to children and pets.
  • Stores should be shielded from direct sunlight.
  • The container’s tight seal depends on both temperature and ventilation.
  • Avoid direct contact with your skin, eyes, and clothing unless necessary.
  • Vapor or aerosol inhalation is discouraged.


Gear oil is classified as flammable material. Safe handling precautions should be conducted to avoid flammability risks.

Frequently Asked Question (FAQs): Is Gear Oil Flammable?

What is the flash point of gear oil?

A lubricant’s flash point (usually 225°C or 440°F for mineral oils) measures its flammability and explosive potential.

Is gear oil hazardous?

The specific danger is flammable and needs some firefighting guidance: Emission of poisonous gases upon burning or decomposition is possible. 

Firefighters should use self-contained breathing equipment and appropriate protective apparel in the event of exposure to vapors or combustion or decomposition products.


What was missing from this post which could have made it better?

Leave a Comment