Armada 80W-140 Synthetic Gear Oil is a full synthetic, multi-purpose, heavy duty gear lubricant formulated for heavy duty differentials that call for an API GL-5 type product. It is a thermally stable, extreme pressure lubricant designed to operate in both high and low temperature conditions for all-season use, even in sub-zero temperatures. Suitable for use where the following specs are recommended: API GL-5, MT-1; Dana SHAES 429 Rev A.; Mack GO-J; Arvin Meritor O76-B, O76-M, General Electric D50E9C; Harnischfeger (P&H) 474; MIL-PRF-2105E; International Truck & Engine 6816; U.S. Steel Spec 224; GMA Standard 250.03