PEAK Gear Lubricant Oil is a multi-purpose gear oil available in SAE 80W-90 and SAE 85W-140 viscosity. Formulated with a blend of high-quality, high-VI base stocks, this gear lubricant provides exceptional protection in severe operating conditions because of its sulfur-phosphorous, extreme-pressure additives. PEAK Gear Lubricant Oil SAE 85W-140 exceeds gear and transmission manufacturers' requirements for API GL-5 or API MT-1 level lubricants. Both PEAK Gear Lubricant Oil SAE 80W-90 and 85W-140 are recommended for use in a number of applications, including: Manual transmissions, Limited slip differentials, final drives and other gear cases in passenger cars and light-duty trucks, Axles of heavy-duty trucks, off-road equipment, tractors, Outboard motors, Benefits associated with using PEAK Gear Lubricant Oils include: Limited slip, Outstanding anti-weld, anti-scuff and anti-wear properties, Exceptional gear and bearing protection.