Tackle the toughest gear challenges with the Ultra1Plus Heavy-Duty Gear Oil Bundle, combining 3 quarts of SAE 75W-140 Synthetic Gear Oil (API GL-5) with 1 quart of SAE 80W-90 Heavy Duty Gear Oil (API GL-5). Engineered for extreme pressure and high-torque conditions, this duo delivers premium synthetic protection for hypoid gears in motorcycle shaft drives, truck differentials, and industrial machinery. The 75W-140 offers exceptional high-temperature stability and shear resistance, perfect for severe-duty applications or hot climates, while the 80W-90 provides versatile, all-season lubricity for slightly lighter loads or colder conditions. Both oils feature advanced anti-scuffing additives, rust protection, and compliance with API GL-5 and MT-1 standards, ensuring long-lasting gear performance. With 3 quarts of 75W-140 for bulk servicing and a 1-quart 80W-90 for flexibility, this bundle is ideal for enthusiasts, fleet operators, and off-road adventurers seeking durability and value.