Choosing the right size oil filter wrench is important for removing your vehicle’s oil filter quickly and easily. The wrong size wrench can slip or damage the filter. This article provides tips on measuring your oil filter and selecting the correct oil filter wrench size.
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Measure the Diameter of Your Vehicle’s Oil Filter
The most important measurement in choosing an oil filter wrench is the diameter of your vehicle’s oil filter. There are two main methods for measuring the filter diameter:
- Use a measuring tape – Wrap a measuring tape around the outside of the oil filter to get its circumference. Then divide this measurement by 3.14 to calculate the diameter. Round up to the nearest whole number.
- Use calipers – If you have a set of calipers, open them to fit snugly around the thickest part of the oil filter. Read the measurement to determine the approximate diameter.
Keep in mind that oil filters come in standard sizes, typically ranging from 2-1/2 to 4-3/4 inches in diameter. Common oil filter sizes include:
| Diameter | Standard Oil Filter Size |
|---|---|
| 2.5 in. | Small |
| 2.8-3 in. | Medium |
| 3.5-3.9 in. | Large |
| 4-4.5 in. | Extra Large |
If the measurement falls between two standard sizes, opt for the larger size oil filter wrench.
Select an Oil Filter Wrench Style
Once you know the diameter of your vehicle’s oil filter, you can select the correct oil filter wrench style and size:
- Banded/strap wrench – These flexible band wrenches tighten around the oil filter for grip. Choose a wrench that fits diameters of about 1/2 inch smaller and larger than your measured size.
- Socket-style wrench – This wrench has fixed, hex-shaped jaws to grip the oil filter. Select the socket size that matches your filter diameter.
- Adjustable wrench – Adjustable filter wrenches have movable jaws that can tighten around a range of oil filter sizes. Pick a wrench that can adjust down to 1/2 inch below your measured diameter.
Socket-style and adjustable filter wrenches usually provide the best grip and easiest leverage for removing stubborn oil filters.
Other Considerations
Here are a few other tips for selecting the right oil filter wrench:
- For easy access to the oil filter, choose a wrench with a long handle for extra reach and leverage.
- Rubber-coated or plastic-dipped wrench handles provide a comfortable grip and prevent slipping.
- Extension bars can add more torque and leverage if reaching the filter is difficult.
- Buy a backup wrench in a different style in case one wrench slips or doesn’t work.
Using Your Oil Filter Wrench
Once you have the right oil filter wrench, here are some tips for removing the old oil filter successfully:
- Position the wrench on the oil filter and turn it counterclockwise to loosen it.
- Tighten the wrench jaws completely so they grip the filter securely as you turn.
- For better leverage, use one hand on the wrench handle and place your other hand on top of the wrench head.
- If needed, let the engine run for a few minutes to warm the oil, making the filter easier to remove.
- Be prepared to apply quite a bit of force, especially for removing an old, stuck filter.
Changing your own oil and filter is one of the easiest DIY auto maintenance tasks. With the right oil filter wrench size matched to your vehicle, you can remove the old filter quickly and get the job done.
Conclusion
Choosing the correct oil filter wrench simplifies oil changes. Start by measuring your oil filter diameter and selecting a wrench designed to fit that size. Socket, band, and adjustable oil filter wrenches are common options. Make sure to pick a wrench with sufficient reach and leverage. Properly positioning the wrench and applying steady force allows you to remove even stubborn filters. With the right tools and technique, you can change your vehicle’s oil filter quickly and easily.