SKU: BPO77296-12
MPN: 77296
The 80w90 Hypoid Gear Oil Case 12 x 1 Qt. GL-4 by PENNGRADE MOTOR OIL is engineered for serious drivers and mechanics who demand reliable differential protection in high-stress driving conditions. This case format delivers twelve quarts of premium hypoid gear oil, designed specifically for limited-slip differentials, manual transmissions, and heavy-duty transfer cases that operate under extreme pressure and temperature variations. Whether you're running a modified truck, vintage muscle car, or performance vehicle with aftermarket driveline components, this GL-4 formulation ensures consistent lubrication when factory oils fall short.
The GL-4 rating indicates this oil meets stringent API (American Petroleum Institute) performance standards, with anti-wear additives that protect ring and pinion gears from scuffing and micro-welding—critical for vehicles experiencing sustained cornering loads, aggressive acceleration, or towing. The 80W90 viscosity rating provides cold-start fluidity in winter conditions while maintaining film strength at operating temperatures, preventing gear chatter and minimizing friction losses during power delivery. PENNGRADE's formulation is compatible with brass synchronizers and limited-slip differential clutches, making it ideal for both stock restorations and modified applications where OEM specifications may be marginal.
Mechanics and enthusiasts favor this case format for fleet maintenance, project builds, and vehicles requiring frequent oil changes due to high-performance use or older designs with marginal cooling. The twelve 1-quart bottles provide convenient portioning for multiple differentials or allow you to stock backup supplies without committing to bulk drums. This product is suitable for pre-1980 vehicles, vintage hot rods, and modern modified platforms where GL-4 hypoid oils remain the factory requirement—always verify your specific differential or transmission manual before application, as some newer limited-slip units require synthetic GL-5 with friction modifiers.
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