For modern I.C engines"ECO" oil filter cartridges are nowadays often applied instead of spin-on filters, which do not have metal elements. These cartridges, similar to traditional oil cartridges are installed in dismountable casings, which are an integral part of the engine. Replacement of used filter cartridge requires more experience than replacement of the spin-on filter. There is potentially more risk of leaving gathered contaminants in the casing or inserting them into the oil system during improper operation. However, advantages from using "ECO" cartridges concerning mainly easy utilisation, encourage designers for their wide application