AMSOIL has Synthetic Compressor Oils. 
Click Here to purchase Compressor Oil. 
AMSOIL PC Series Synthetic Compressor Oil is a long-life, premium
  compressor lubricant based on novel, proprietary technology. It incorporates
  the highest quality, thermally stable PAO synthetics fortified with
  premium non-detergent additives for maximum protection at high temperatures.
  It lasts up to 8,000 hours, effectively reducing maintenance
  and waste oil disposal costs. (
AMSOIL.com)

AMSOIL 
SIROCCO® Synthetic Compressor Oil is formulated with
  premium synthetic ester technology. This high-quality, long-life fluid lasts
  several times longer in use than mineral-based oils. AMSOIL SIROCCO
  Compressor Oil is fully formulated with non-detergent additives and is
  designed for use in rotary screw compressors and vacuum pumps.
  SIROCCO effectively protects against wear, oxidation, foam and rust. Its
  inherent lubricity and good thermal conductivity allow it to reduce heat
  and energy consumption. AMSOIL SIROCCO Synthetic Compressor
  Oil increases operating efficiency, reducing energy and maintenance
  costs. AMSOIL SIROCCO maintains performance across a wide
  operating temperature range. Its low pour point, high viscosity index
  and lack of paraffins (wax) make it an excellent all-season lubricant.  At cold temperatures, equipment starts easier and the
  lubricant is quickly pumped to critical components, preventing lubricant
  starvation and excessive wear. SIROCCO also repels water to prevent
  damaging oil/water emulsions, allowing for longer lubricant life and ease
  of water removal from the reservoir. (
AMSOIL.com)
