"On nie używa oleju."

Translation: He does not use oil.

[Euhan1]

He prefers a water based lubricant.

[gorycaje]

Why not "He is not using the oil"?

[Jellei]

Well, if there was some oil mentioned before (like you gave him a bottle of some super oil and you're complaining that he's not using it) then I guess it would work, so I'll report it.