From
the expert on diesel and gasoline systems:
Bosch
oil filters
Impurities in engine oil cause engine components to wear prematurely.
Friction is generated continuously by the movement of engine components. This causes metal particles to come loose. The oil minimizes these frictions and discharges the accumulating particles. The oil also serves to dissipate heat, seal and protect against corrosion.
Bosch oil filters clean the oil of dirt particles and therefore protect the engine.
A clogged oil filter can absorb no more particles. The impurities in the oil cause lasting damage to the engine.
For safer and cleaner driving, trust Bosch, the worldwide filter specialist.