This is the 13216th most frequent Polish word.
olejowego
"Oil-related" or "pertaining to oil."
In this sentence, 'olejowego' is used as an adjective describing the type of filter related to oil, specifically in a car's engine system.
Silnik mojego samochodu potrzebuje nowego filtru olejowego.
My car's engine needs a new oil filter.
'Olejowego' describes the type of light (attached to the lamp) which uses oil as its fuel.
Kupiliśmy lampę olejowego światła na wyprzedaży.
We bought an oil lamp at the sale.
Here, 'olejowego' describes the origin of the mysterious ingredient, stating it is derived from oil.