Diamond Class® Turbine Oil

Long-Life, Rust & Oxidation-Inhibited Turbine Oil

Phillips 66® Diamond Class Turbine Oil is a premium quality, rust and oxidation (R&O)-inhibited turbine oil developed for use in gas turbines and steam turbines in severe service. It is specially formulated to protect against sludge and varnish formation in new-generation gas turbines.

Features & Benefits

  • Outstanding oxidation resistance and thermal stability for long service life
  • Outstanding control of sludge and varnish formation in base-loaded and peaking turbines
  • Protects against rust and corrosion
  • Excellent water-separating properties
  • Resists the formation of emulsions and bacteria buildup
  • Good foam resistance
  • Meets ISO Cleanliness Code rating of 18/16/13


  • Direct-drive, combined-cycle and co-generation gas turbines
  • Direct-drive steam turbines

Technical Details