DUROMAX DUAL FUEL XP5000EHC Manuel D'utilisation page 43

4.
Wash filter element
Wash the sponge-like elements in household dish detergent
and warm water.
5.
Dry filter element
Allow the elements to dry completely.
6.
Add engine oil to elements
Soak the dry elements in a small amount of engine oil. Ring
out any excess oil.
7.
Replace elements in casing
Replace the sponge-like elements in the air cleaner casing and
replace the cover.
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