h- is right. They "fixed" the oil pumps with patch 1.14. But IMO they fixed them too good, because they now will not stop. I wrote a nice burning exploding oil script for pumps placed via the editor, but patch 1.14 makes it no good because after I explode, tilt, and sink the pump partly in the ground, the pump keeps on pumping and looks stupid.
But if all you need is working pumps, upgrade to patch 1.14.