Phillips 66 Lubricants, one of the largest finished lubricant suppliers in the U.S., announced it has re-engineered its turbine oils with outstanding RPVOT retention for superior protection against oxidation and sludge/varnish. The new oils are among the highest-performing turbine oils in the Power Generation industry—with Phillips 66 Diamond Class® Turbine Oil outperforming the leading competitors by more than 60 percent in RPVOT* retention.