MP Gear Lube

Multipurpose Automotive Gear Lubricant, API GL-5/MT-1

Phillips 66®Gear Lube is a multipurpose, API GL-5 automotive gear lubricant specifically designed for use in passenger car and truck axles with hypoid gear sets. It also is recommended for use in some heavy-duty manual transmissions in trucks and buses.

Features & Benefits

  • Excellent oxidation resistance and thermal stability to minimize sludge and varnish formation
  • Excellent thermal durability and extreme-pressure (EP) properties for extended gear life
  • High load-carrying capacity for protection against scuffing and wear
  • Protects against rust and corrosion
  • Good foam resistance


  • Service fill of conventional differentials in passenger cars and trucks
  • Top-off only of limited-slip differentials in passenger cars and light trucks (1)
  • Service fill of differentials, final drives and transfer cases in some off-highway equipment
  • Non-synchronized manual transmissions in trucks, buses and heavy equipment where the manufacturer specifies an API GL-5 or MT-1 gear oil

(1) Note: For complete drain and refill, many limited-slip differentials may require the manufacturer's specified gear lubricant or supplemental additive. Refer to the owner's manual for specific requirements.

Technical Details

Licenses & Approvals

MP Gear Lube meets or exceeds the requirements of:

  • API Service GL-5, MT-1
  • Meritor O76-A (SAE 85W-140), O76-D (SAE 80W-90), O76-E (SAE 75W-90)
  • MIL-PRF-2105E

MP Gear Lube is registered or approved for:

  • Mack GO-J (SAE 80W-90, 85W-140)
  • MAN 342 Type M2 (SAE 75W-90, SAE 80W-90)
  • MAN 342 Type M1 (SAE 85W-140)
  • SAE J2360 (SAE 80W-90, 85W-140)
Additional Details
SAE Grade75W-90
Specific Gravity @ 60°F0.878
Density, lbs/gal @ 60°F7.31
Color, ASTM D15001
Flash Point (COC), °C (°F)190 (374)
Pour Point, °C (°F)-45 (-49)
Viscosity, Brookfield
cP @ -40°C120000
cP @ -26°C---
cP @ -12°C---
Viscosity, Kinematic
cSt @ 40°C101
cSt @ 100°C15
Viscosity Index156