The ultimate transmission oil that far exceeds API GL-5 specifications, this Synchromesh Transmission Synthetic Oil offers increased stability and remarkably reduced oxidation. The Synchromesh Transmission Synthtic Oil takes transmission fluids to another level by combining base stocks with additives that allow for higher load, increased stability and a dramatic reduction in oxidation when compared to other API GL-5 gear oils. This oil also offers very high thermal stability and an amazing consistency in viscosity, therefore providing remarkable wear protection.