Vilter brand line of high performance compressor lubricants are intended for use with rotary screw and reciprocating compressor applications in ammonia refrigeration processes. Providing thermal, oxidative and hydrolytic stability that allows for extended drain intervals, the 717FG lubricant has a stable viscosity and low pour point, which allow the product to remain effective in applications where temperature extremes are required. The lubricant meets the requirements of 21 CFR 178.3570 for incidental food contact, has the same characteristics as Vilter 717 oil, and can be added to existing systems using Vilter 717 oil. The ammonia compressor lubricants are based on severely hydrocracked, iso-dewaxed oil. They are formulated with an advanced additive system developed for effectiveness in an aggressive ammonia environment and provide very low foaming performance in ammonia systems.