ULTRA 1PLUS Gear Oil SAE 80W-90 API GL-5 — 1 Gal Heavy-Duty Hypoid Protection, Shear-Stable

ULTRA 1PLUS SAE 80W-90 Gear Oil API GL-5 (1 gallon) is a heavy-duty hypoid gear lubricant engineered to protect differentials, axles and manual transmissions under high loads and extreme temperatures.

This professional-grade gear oil combines high film strength with additives designed to lower wear, resist shear, and maintain stable viscosity across hot and cold operating conditions. It's formulated for vehicles that call for API GL-5 performance and 80W-90 viscosity — a common specification for passenger cars, light trucks, SUVs, and vans that require robust extreme-pressure protection in hypoid gears and axle sets. Below you’ll find practical answers to the most common buyer questions and a quick list of what this product delivers.

How does ULTRA 1PLUS 80W-90 protect gears during heavy use?

Its advanced extreme-pressure and anti-wear additives form a resilient lubricating film on gear teeth, reducing metal-to-metal contact under high torque and shock loads. The formula is engineered to slow wear mechanisms like pitting and scuffing so gears retain smooth operation over longer intervals.

• API GL-5-rated additive package for hypoid gear protection
• Anti-scuffing agents that lower friction and surface damage
• Reduces pitting, spalling, and chatter during heavy loads

Will this oil perform in extremes of heat and cold?

Yes — the 80W-90 viscosity grade maintains reliable flow at low temperatures for cold starts while offering thermal stability at high operating temperatures to resist thinning and breakdown. The shear-stable base and rust/oxidation inhibitors extend useful life and preserve protective film integrity across seasonal extremes.

• Stays viscous enough for low-temperature lubrication
• Thermally stable to resist oxidation and viscosity loss
• Anti-foam and anti-rust components for long service life

Which vehicles and components is this gear oil suitable for?

Use ULTRA 1PLUS SAE 80W-90 where manufacturers specify API GL-5 or compatible GL-4/GL-5 service and a manual transmission or differential that accepts 80W-90 fluid. It works well in hypoid differentials, solid axles, and many manual gearboxes in light vehicles and trucks.

• Hypoid differentials in passenger cars and SUVs
• Axles and final drives on light trucks and vans
• Manual transmissions that list 80W-90 or GL-5 compatibility

How does this product handle long-term durability and maintenance?

The formulation emphasizes shear stability and resistance to oxidation, rust, and varnish, helping the fluid retain protective properties between service intervals. That means fewer premature oil changes and sustained gear quietness and efficiency when used according to vehicle manufacturer recommendations.

• Shear-resistant to maintain viscosity under mechanical stress
• Oxidation and rust inhibitors reduce sludge and corrosion
• Foam control prevents aeration for consistent lubrication

Who this is for: If you need a dependable, workshop-grade gear oil for hypoid differentials, axles or manual transmissions that demand API GL-5 performance and an 80W-90 viscosity, this ULTRA 1PLUS one-gallon container delivers a professional solution. It's aimed at DIY mechanics, fleet operators, and service shops looking for heavy-duty protection, thermal resilience and long-lasting wear control for light vehicles and trucks.