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Are Oil Filters Reverse Threaded? (Quick Answers)

You have to change your oil filter in due course if you want a better-performing engine. And many people struggle to remove the oil filters that are struck.

Many don’t even know in which direction the oil filters will rotate. Let’s find out how to remove an oil filter and whether they are reverse threaded.

Are oil filters reverse threaded?

Oil filters are indeed reverse threaded. To open an oil filter, it has to turn counter-clockwise or in the left direction. Historically, the direction of a thread depends on human physiology. However, it is not comparable to indicating which direction is better for threading.

Oil filters are essential if you want to get the most efficiency from your engine. The engine oil runs in a cycle inside the engine. And it gets contaminated over time.

Oil filters keep the oil to get contaminated and pure from unwanted particles and put the engine cool. Good filtration increases the efficiency of an engine. 

Usually, oil filters are installed near the combustion chamber. To install and remove the oil filter, you have to rotate the filter. The Head of the oil filter is threaded, and you have to rotate it accordingly.

Ford oil filters:

Ford vehicles are known for their performance. They suggest their customers buy authentic oil filters from a specific brand that also supplies many other engine manufacturers.

These oil filters are usually opened counterclockwise.

Harley Oil Filters:

Harley engines also require oil filters to keep the engine free from contamination. A tightened oil filter is difficult to loosen. But using tools and rotating toward the left side can open oil filters in Harley vehicles.

Honda oil filters:

Honda vehicles also use oil filters that turn counterclockwise or towards the left. These oil filters are very easy to find and affordable.

As all engines require filtration for a good life span, oil filters are necessary. Although many brands, designs, and size variations exist, most filters are opened counterclockwise.

Which way do oil filters turn?

Oil filters are an important part of a well-maintained engine. An oil filter cleans the engine by filtering contaminants, allowing pure oil to pass through it, and keeping it clean.

Locating at right before the combustion chamber, oil filters keep the most functional part of the engine safe from getting contaminated or paralyzed.

Different manufacturers produce oil filters and they usually design their oil filters according to their preferences. However, it is unlikely to see a major difference in the whole structure other than the size of the thread and gasket.

In usual cases, oil filters turn left. That means they can only rotate toward the anti-clockwise direction. This is an almost universal practice to keep oil filters in the same direction.

Do oil filters screw on backward?

Oil filters save engines from keeping polluted and contaminated oil fresh. By filtering different objects, they keep the engine oil clean, which is essential to keep the engine functional, cool in temperature and most importantly, efficient.

Oil filters are removable parts. After its life span, which is six months for conventional oil filters and 12 months for synthetic oil filters, you can, and you should, change the filter.

You may find it unusual while changing the filter as it screws counterclockwise or backward.

Do oil filters have different threads?

Oil filters are not ‘one size fits them all,’ and you can hardly use one oil filter with any other engine. Different manufacturers design their threads according to their research and product design. 

Most engine manufacturers design their products with little or no change. However, variation in size in threads and gaskets is common. As a result, buyers have to be conscious about determining the perfect thread for their engine.

Although there are many types of filters, such as synthetic and conventional, they come in different threads. It doesn’t mean that threads are similar to one type of filter only.

Nonetheless, a righteous filter is needed both for the good performance of the engine and the longevity of the motors.

What is the thread size of an oil filter?

Oil filters are an essential component of a well-maintained engine that filters pollutants, allows pure oil to flow through the engine, and maintains the engine clean.

These come in different thread sizes according to the manufactures guide best suited filters can be found. But the standard will be 13/16″-16 threads per inch.

Thread size is an essential aspect of a perfectly working oil filter and filtration system. This is the measurement of the opening of the engine tank. Thread size allows the filter to fit with the engine perfectly.

If a filter is not well adjusted, the filtration system becomes compromised. In a compromised situation, the engine will lose its efficiency. So, in short, thread size is the measurement that is required to keep a healthy engine life.

What size is my oil filter thread?

Oil filters are an essential component for the efficient use of engine oil. Oil filters play a heavy role in the performance of an engine. Thus choosing the correct filter size is significantly prioritized when people want to care for their vehicle.

To find the right filter size for your engine, do the following-

You can drain the oil into a catch pan after removing the oil filter. Measure the diameter of the screw hole on the old filter with a ruler. Also, use a thread gauge to measure the filter threads.

Second, measure the filter’s diameter, including the sealing area, excluding the rubber seal section. You must also measure the filter’s height.

A taller filter than the factory requirements can be fitted if there is enough space. This will extend the filter’s life and enhance the flow of oil.

You can find your perfect oil filter by comparing this information with online guides.

How do you remove an oil filter thread?

There might be a lot of reasons why your oil filter is stuck. Although it might be important for you to change the filter immediately, you should not worry if it does not come off.

At first, let’s explore why it is stuck and if you can check the reasons that may be keeping you in worry. The most important reason might be the lack of oil on top. So you must check and put some oil before attempting.

And secondly, if you had tightened it hard, it might be a reason this time. So, do not screw it tight this time; it is an investment for later.

Now, if you want to remove an oil filter, these are the ways you can follow.

Oil filter Wrench: 

You are neither the first person to face this situation nor the last person who will get their oil filters stuck. As a result, an oil filter wrench is available, and they work fantastic.

If you buy the appropriate wrench according to your oil filter’s size, this will be an effortless job for you to have the oil filter removed.


Sandpaper is a cheaper substitute for a fancier oil filter wrench. As sandpapers are easy to find and most households must have sandpapers lying around here and there, it is, of course, a more accessible solution.

Grip the oil filter with the grittier side and twist the oily surface easily.

Screwdriver and hammer:

Now, it is not about a sophisticated way. If the previously mentioned ways fail, you need to replace the filter as soon as possible, no matter how.

Use the screwdriver and hammer it to last to get it out of the chamber.

Final thoughts

Generally, manufacturers produce oil filters that rotate counterclockwise. This Omnidirectional component turns only to the left. In addition to it, they come in different sizes. Different thread sizes determine their suitable engine. But in most cases, direction does not change with thread size.