The JC series perfluoropolyether (PFPE) oils serve as the base fluid for manufacturing PFPE greases capable of withstanding high and low temperatures. They can also be used as standalone lubricants, delivering exceptional lubricity and comprehensive performance. Key properties include no flash point, non-flammability, low surface tension, non-toxicity, environmental friendliness, extraordinary chemical inertness, low volatility, superior lubricating properties, high dielectric strength, excellent electrical insulation, and insolubility in non-fluorinated solvents. When formulated with thickeners and functional additives, the resulting PFPE greases exhibit no oxidation, no coking, and no corrosion under prolonged high-temperature service. They offer outstanding electrical insulation and superior overall performance to meet the most demanding customer requirements.