How to Identify the Model of an Oil Filter?
3 Answers
You can check the model of an oil filter on its housing, as it usually carries the manufacturer's part number. Each manufacturer has its own unique coding system, and the identification can be done in the following ways: 1. Oil filters typically start with 'JX' to indicate their type. The following numbers can help determine the appropriate filter model for the vehicle. 2. Original equipment manufacturer (OEM) oil filters and aftermarket filters have different coding systems. OEM filters usually do not include 'JX' and may consist entirely of numbers or letters. In such cases, use calipers to measure the thread size and sealing ring dimensions to select the correct filter. 3. There are many models of oil filters, as each vehicle model requires a different filter. Examples include screw-type air compressor oil filters, WK962/7, WK940/20, and others.
When changing engine oil, I always make it a habit to check the oil filter model number, usually found on the side or top of the removed filter as a numeric or alphanumeric code like 'FRAM PH8A'. Keep a pair of gloves handy to avoid oil obscuring visibility; use your phone to take a photo and zoom in for a clear and safe view of the code. Getting the wrong model can be harmful—it might not fit or seal properly, leading to oil leaks and engine damage that affects performance. I recommend buying a new filter before each change to compare or using an online compatibility tool by entering your car's make and year. Once, I bought a filter with a model number off by one digit—it leaked oil everywhere when screwed on. Luckily, I stopped the car in time to prevent piston ring damage. Now, I always take photos of the model number and save them on my phone for easy reference when shopping online, saving the hassle and cost of unnecessary trips to the repair shop. The correct model ensures proper filtration and protects engine longevity—this small detail is not to be overlooked.
As an experienced car owner, my method for identifying oil filter models is to check the markings on the old part's casing after removal—the metal section usually has clearly engraved codes. Alternatively, you can consult the vehicle manual or online resources for model charts without removing it. Model confusion often occurs due to generational changes in vehicle models, especially with imported versions. Always use your camera to take clear photos and save them for future reference when purchasing parts. I've found that choosing the wrong model can lead to filtration failure, increased oil contaminants, and accelerated component wear. Regularly recording model numbers in a notebook or app helps avoid confusion. During replacement, ensure the correct seal ring size matches to prevent loose connections, which waste oil and harm the environment. Simply put, developing this habit saves hassle and money—no need to overcomplicate it.
