Oil filters
The oil filter removes wear products from the lubrication circuit — metal filings, soot, varnish and organic acids generated during engine operation. Contaminated oil loses its lubricating properties and accelerates wear on bearings, camshafts and cylinder liners. This makes oil filter replacement one of the most critical service tasks.
Oil filters are categorised as spin-on (self-contained canister), cartridge inserts (fitted into an engine-mounted housing) and by-pass filters for sub-micron particle filtration. Filtry.org stocks oil filters from HIFI Filter, SF Filter and PZL Sędziszów for petrol, diesel, gas engines as well as hydraulic and transmission systems.
Frequently asked questions
What is the difference between a spin-on filter and a cartridge insert?
A spin-on filter is a complete module with its own canister — you unscrew and discard the whole unit. A cartridge insert requires opening the engine-mounted housing and replacing just the filter element. Cartridges produce less waste but demand more care during installation to avoid leaks.
Can I use an aftermarket oil filter instead of the OEM part?
Yes, provided the replacement matches key parameters: flow rate, by-pass valve cracking pressure, anti-drain valve specification, filtration rating and mounting dimensions. HIFI, SF and PZL filters meet OE standards and are certified cross-references.
What happens if I leave the oil filter in too long?
A clogged oil filter forces the by-pass valve open, allowing unfiltered oil to circulate. This leads to accelerated wear on moving engine parts and, in extreme cases, bearing seizure.
Can I use an engine oil filter in a hydraulic system?
No. Hydraulic filters operate at much higher pressures and require finer filtration (often 10 µm or less). Fitting an engine oil filter in a hydraulic circuit risks pump damage and proportional-valve failure.