De or het oliehaard?

The correct Dutch article is:

de oliehaard

How to use oliehaard

the oliehaardde oliehaard
this oliehaarddeze oliehaard
that oliehaarddie oliehaard
our oliehaardonze oliehaard
your oliehaardjouw oliehaard
every oliehaardelke oliehaard
which oliehaard?welke oliehaard?
a big oliehaard / the big oliehaardeen grote oliehaard, de grote oliehaard