This third-generation, high thermal stability (HTS) oil was formulated to deliver exceptional high-temperature thermal stability and improved resistance to deterioration and deposit control versus Standard Type II oils. ExxonMobil Research and Engineering testing showed Mobil Jet Oil 254 lubricant offers excellent resistance to coking and deposit control, and provides exceptional oxidation and corrosion protection. Laboratory tests indicate Mobil Jet Oil 254 provides a 40 percent advantage in higher-temperature bulk oil stability vs. competitive HTS oils tested.