High-performance synthetic Extrem Pressure gear lubricant oils with excellent properties such as a high viscosity index and very low pour point. They are formulated with a combination of polyalphaolefin and selected additives that provide good anti-wear and EP performance, enhance thermal/oxidation stability and protect against rust and corrosion including copper. They are recommended for multiple applications in severe operating conditions, working under heavy loads and low speeds. Their properties remain stable in a wide range of temperatures, including high temperatures where a conventional oil would quickly oxidize. Improved thermal and oxidation stability helps in providing much longer service life under adverse conditions than with conventional mineral oils. They are highly resistant to micropitting. The high quality of the products extends the equipment life in severe service.