Bobcat advises working with hydraulic oils exclusively rated for hydrostatic push programs in their devices. It is important to stay away from applying universal tractor fluids and engine oils in Bobcat hydraulic units, as newer styles not suggest engine oils and as an alternative advise oils rated for hydrostatic drives. https://automotive-technician97543.bloggosite.com/33600516/everything-about-types-of-hydraulic-fluid-for-bobcat-753