FJC’s Part # 2458 (8 oz) and 2459 (Quart) ZEROL HD46 is a polyalkylene glycol lubricant designed specifically for application with R-1234yf refrigerant in mobile air conditioning systems. The oil is a double end-capped PAG, and is manufactured to exacting standards of high efficiency. ZEROL HD46 is suitable for use in both belt- and electrically-driven