Gear Oil GP

Highly Compounded, Non-EP Worm Gear Lubricant

Phillips 66®Gear Oil GP is a high-quality, highly compounded, non-EP gear lubricant developed for the lubrication of heavily loaded worm gear drives operating at low to medium speeds and moderate to high temperatures. It is particularly recommended for use in worm gear swing drives on bucket trucks and other mobile equipment.

Features & Benefits

• Excellent lubricity for protection of sliding surfaces against scuffing

• High load-carrying capacity

• High film strength

• Emulsifies with water to resist washing

• Good oxidation resistance and thermal stability

• Protects against rust and corrosion

• Non-corrosive to bronze or brass


• Worm gear drives for winches, telescoping booms, digger derricks and electric utility bucket trucks

• Industrial worm gear drives made with non-ferrous alloys (bronze-on-steel, bronze/aluminum alloy-on-steel)

• Heavily loaded, low-speed bearings subject to moisture contamination

• Differentials on classic and antique vehicles that require an API GL-2 quality gear oil

Technical Details

Licenses & Approvals
Additional Details
ISO Grade460
AGMA Grade7 Comp
Specific Gravity @ 60°F0.901
Density, lbs/gal @ 60°F7.5
Color, ASTM D15004.5
Flash Point (COC), °C (°F)152 (305)
Pour Point, °C (°F)-27 (-17)
cSt @ 40°C460
cSt @ 100°C30.5
SUS @ 100°F2466
SUS @ 210°F150
Viscosity Index95
Acid Number, ASTM D974, mg KOH/g1.12
Copper Corrosion, ASTM D1301a
Foam Test, ASTM D892, Seq. I, mL10/0
Four-Ball EP, ASTM D2783, Weld Load, kgf400
Four-Ball Wear, ASTM D4172, Scar Diameter, mm0.61
Rust Test, ASTM D665 A&BPass
Timken OK Load, ASTM D2782, lb65