HO-3, HO-4 & HO-5 | Lubriplate Lubricants Co. High-Performance, Heavy-Duty, Multi-Functional Lubricating Oils These multi-functional oils are recommended for gear cases, bearings, central lubricating oil systems, air compressors, hydraulic systems and chains. These oils contain fluid zinc anti-wear additive, high aniline points for controlled seal-swelling characteristics, and excellent foam suppression properties.