Proper function and operating safety of hydraulic systems are largely influenced by the quality of the hydraulic fluid. In addition to the task of transferring forces, the operating fluid must seal, cool and lubricate. Since hydraulic oils are exposed to high stress due to the operating conditions, they have to fulfill a large number of requirements. The oils of the RENOLIN B HVI series are formulated on the basis of highly ageing-resistant base oils containing additives that further increase the aging resistance. The products of the RENOLIN B HVI series are zinc-containing HVLP hydraulic and general lubricating oils according to DIN 51524-3: Mineral oil-based, demulsifying.