Syncon®Premium EP Gear Oil

Synthetic PAO-Based Extreme-Pressure Gear Lubricant

Phillips 66®Syncon Premium EP Gear Oil is a premium quality, synthetic, extreme pressure gear lubricant specifically recommended for lubricating the heavily loaded gears and rolling-element bearings in motorized wheel gearboxes found on mining haul trucks. It also is recommended for lubrication of enclosed industrial gear drives operating at extreme temperatures.

Features & Benefits

• Outstanding oxidation resistance and thermal stability at high temperatures

• Outstanding low-temperature properties

• High load-carrying capacity

• Protects against scuffing and wear

• Protects against rust and corrosion

• Non-chlorinated additive system

• Suitable for year-round use

• Extended service intervals compared to conventional mineral oil-based gear oils


• GE motorized wheels found on mining haul trucks

• Enclosed industrial gear drives operating at very high or very low temperatures, or operating continuously at higher than normal operating temperatures

• Heavily loaded plain and rolling-element bearings operating at extreme temperatures

• Applications where the equipment manufacturer recommends a synthetic extreme-pressure gear oil

Technical Details

Licenses & Approvals

Syncon Premium EP Gear Oil meets the requirements of the following industry and OEM specifications:

• ANSI/AGMA Standard 9005-E02, Anti-Scuff/Anti-Wear (EP) Oils

• DIN 51517 Part 3, Lubricating Oils, Type CLP HC

• GE Specification D50E27 (approved)

• German Steel Industry SEB 181226, Type CLP HC

• ISO 12925-1:1996, Type L-CKC

• Joy Machinery Specification TO-SHEP (ISO VG 320)

• U.S. Steel 224

Additional Details
ISO Grade320
AGMA Grade6 EP
Specific Gravity @ 60°F0.877
Density, lbs/gal @ 60°F7.3
Color, ASTM D15001
Flash Point (COC), °C (°F)238 (460)
Pour Point, °C (°F)-34 (-30)
cSt @ 40°C320
cSt @ 100°C29
SUS @ 100°F1682
SUS @ 210°F142
Viscosity Index123
Acid Number, ASTM D974, mg KOH/g0.4
Copper Corrosion, ASTM D130, 48 hrs @ 80°C1b
Four-Ball EP, ASTM D2783, Weld Load, kgf250
Four-Ball Wear Test, ASTM D4172, Scar Diameter, mm0.36
FZG Scuffing Test, ASTM D5182, Failure Load Stage>12
Oxidation Stability, ASTM D2893B
Viscosity Increase @ 121°C, %<4
Precipitation Number, ASTM D91, mLTrace
Rust Test, ASTM D665 A&BPass
Timken OK Load, ASTM D2782, lb>60