Castrol Molub-Alloy™ 1000 HT (previously called Molub-Alloy™ 1000) extreme temperature grease utilises synthetic base oils in conjunction with a blend of lubricating solids selected for high temperature service. The synthetic fluids in Molub-Alloy 1000 HT were selected for their controlled low volatility, minimum residue after evaporation and high VI for additional film strength at elevated temperatures. The combination of synthetic fluids and a unique thickening system offers physical stability in prolonged service at high temperatures. Molub-Alloy 1000 HT remains more pliable than conventional high temperature greases. As a result of the higher viscosity synthetic base fluids used in Molub-Alloy 1000 HT, the film strength at elevated temperature is superior to that of petroleum base oils. It is also formulated with a combination of rust and oxidation inhibitors for prolonged service life without relubrication.