High Performance Gear Oil

High-Performance, Friction-Modified Automotive Gear Lubricant

Phillips 66®High Performance Gear Oil is a heavy-duty, API GL-5 automotive gear lubricant specially designed for use in racing applications. It also will provide excellent protection in passenger car and truck axles with either conventional or limited-slip differentials.

Features & Benefits

• Excellent oxidation resistance and thermal stability to minimize sludge and varnish formation

• Excellent thermal durability and extreme-pressure properties for extended gear life

• High load-carrying capacity for protection against scuffing and wear

• Protects against rust and corrosion

• Good foam resistance

• Friction-modified to prevent chatter in limited-slip and positraction differentials


• Axles on racing vehicles

• Passenger car and truck axles with either conventional or limited-slip differentials

• Suitable for initial fill of new or rebuilt limited-slip differentials, for top-off and | for refill after a complete drain

Technical Details

Licenses & Approvals

High Performance Gear Oil meets or exceeds the requirements of:

• API Service GL-5

• Mack GO-J

• MIL-PRF-2105E

• SAE J2360

Additional Details
SAE Grade80W-90
Specific Gravity @ 60°F0.883
Density, lbs/gal @ 60°F7.35
Color, ASTM D15003
Flash Point (COC), °C (°F)212 (414)
Pour Point, °C (°F)-30 (-22)
Viscosity, Brookfield
cP @ -26°C90000
Viscosity, Kinematic
cSt @ 40°C139
cSt @ 100°C14.5
Viscosity Index103