Why are some oil filters different sizes for the same car?

Lurline Treutel asked a question: Why are some oil filters different sizes for the same car?
Asked By: Lurline Treutel
Date created: Thu, May 27, 2021 3:15 AM

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FAQ

Those who are looking for an answer to the question «Why are some oil filters different sizes for the same car?» often ask the following questions:

❔ Do oil filters have different sizes?

Do oil filters have different sizes? As a result, it's quite possible they will have different oil filters as the filters are sized according to the amount of oil that needs to flow through them. If, instead, you mean a different oil filter for the SAME engine, then most likely the larger filter is a performance filter and supports a higher flow rate.

❔ Oil filter size: why are oil filters different sizes?

Why Do Oil Filters Come in Different Sizes? Oil filters all perform the same general role: They help keep motor oil clean and hold contaminants. Some engines, such as those in simple passenger cars, require only a small filter to handle the relatively small amount of oil in the vehicle.

❔ Different size filters?

The most common AC filter sizes and furnace filter sizes are the 16x20x1 air filter, 20x20x1 air filter, the 16x25x1 air filter and the 20x25x1 air filter. All of these ac filter sizes can be found in the air filter size chart. The chart is a furnace filter size finder just click on the filter sizes and you will see purchase options.

10 other answers

The only reason that makes sense is the car has different engine options. For example, a Ford Mustang can be purchased with a 4 cylinder or a V8. These are very different engines and thus may have different oiling requirements. As a result, it’s q...

Wrong. If the oil filter has any effect on your oil pressure, you have a bigger issue. That's like saying a larger ANL fuse will give your amp more wattage. A larger fuse might allow more to flow through it, but it won't increase anything downstream. Same concept with an oil filter.

Many times the same engine is used in many different vehicles, and the manufacturer will use the same filter for all of them, based on the tightest application, no matter how much room there is. This makes the option of using a larger capacity filter, having a much greater amount of filtering media, open to use, if you have the room.

The filter media must remove particles from the oil in the target size range (10 microns for instance), depending on the reliability objectives of the car owner. Obviously, a small micron-size oil filter is associated with lower wear rates and prolonged engine life (more on this later).

When you get a chance, check out the size of the Mobile One that is called out for your car and see what size it is as compared to the Purealator. This site is a little dated now but still has some interesting information on it. Engine Oil Filter Study I run an oversized filter on my Jeep.

Types of filter media. Oil filters have different media, or membranes, inside them that filter out and clear the contaminants of the motor oil as it circulates. Cellulose filter media: Typically, disposable oil filters have cellulose filter media. This media can hold back particles 8 to 10 microns in size and can clean up to 40% of the motor oil.

Length & size: in order to choose the right oil filter size, you must know the make, year, and model of the car. If the size of the filter is wrong, oil will leak. The length and overall size of the gasket is important too. It must fit perfectly. Media: synthetic media is much better than the traditional pleated paper ones. It can trap more contaminants and lasts longer.

The typical OEM or standard replacement oil filter with cellulose fiber media will trap about 97.5 percent of most particles that are 15 to 40 microns in size or larger. Some filters use a combination of cellulose fibers and non-woven plastic or synthetic fibers to improve filtering efficiency.

Filters are not created equal. The intended application for a given oil filter has a big impact on the design and engineering of the component. Internally, a racecar’s oil filter is far different from a passenger car’s filter. In a typical passenger car engine, oil enters the filter at the filter pad, most often part of the engine block.

A larger oil filter needs to have the same specs (as OEM size filter) for threads, diameter, bypass valve pressure. Those specs are published at each oil filter manufacturer's website. No matter what size oil filter you buy, you should always get one with an ANTI-DRAINBACK VALVE because this keeps oil in the filter when engine is turned off.

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