What type of oil filter requires a strap wrench for loosening?

Spin-on filters are designed with a circular shape and a threaded base that allows them to be easily screwed onto the engine or a mounting point. They are sealed with an O-ring to prevent leaks and can be tightly secured to withstand high pressure and vibrations present in an engine's operating environment.

When it comes time to replace or service these filters, a strap wrench is particularly useful. This tool wraps around the exterior of the filter, distributing the force evenly across the surface and allowing for a strong grip. This is especially important for spin-on filters because they may be tightly fastened or stuck due to heat and oil residue. The strap wrench helps provide the necessary leverage to loosen the filter without damaging it or the surrounding components.

Other types of filters, such as cartridge, mesh, and magnetic filters, have different designs and attachment methods that typically do not require a strap wrench for removal. For example, cartridge filters are more likely to be removed by hand or using a traditional wrench, while mesh and magnetic filters may not be as tightly secured and can often be unscrewed manually without additional tools.