This lubricant is comprised of highly refined synthetic base oils and is rated for 4,000 hours. When placed against comparable fluids available on the market, this fluid has a higher flash point, which improves safety and increases thermal stability. This fluid is commonly used in dusty/dirty environments or in partial duty rotary screws, which do not require an 8,000 hour run time lubricant. This is a direct replacement for Sullair 250030-757 AWF compressor lubricant.