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GUARDOL® NG-D

PREMIUM SYNTHETIC BLEND ENGINE OIL FOR VEHICULAR NATURAL GAS AND DIESEL APPLICATIONS

Phillips 66® Guardol NG-D is a high-quality synthetic blend engine oil designed for natural gas and diesel engines. It features optimal levels of anti-wear additives to meet the enhanced wear protection needs of diesel and natural gas engines. It is ideal for transit buses, school buses, delivery trucks, and other vehicles equipped with Cummins, Detroit Diesel, Volvo, or converted compressed natural gas engines.

Guardol NG-D delivers excellent oxidation and nitration resistance, enabling extended drain intervals. Its advanced formulation minimizes sludge and deposit formation, ensuring engine cleanliness while protecting against valve stem deposits and valve seat recession. These benefits reduce maintenance needs and extend engine life. The oil also resists foaming and aeration for reliable performance.

GUARDOL® NG-D

Links of Interest

Product Datasheet
Product Datasheet (Spanish)
Safety Datasheet
Warranty Information

Features & Benefits

  • Designed for engines fueled by diesel or natural gas (CNG)
  • High dispersancy protects against sludge and varnish formation
  • Outstanding resistance to oxidation and nitration
  • Protects against scuffing and wear
  • Protects against valve stem deposits and valve seat recession
  • Reduces risk of misapplication in mixed fleets
  • Extended drain capable

Applications

  • Transit buses, school buses, delivery trucks and other vehicles operating on CNG or Natural gas.

Technical Details

Licenses & Approvals:

Guardol NG-D is approved for:
  • Cummins CES 20092
  • Cummins CES 20086
  • API CK-4/SN
Guardol NG-D meets the performance requirements of:
  • Detroit Diesel DFS 93K222
  • Volvo VDS 4.5

Additional Details:

SAE Grade 15W-40
Specific Gravity @ 60°F 0.876
Density, lbs/gal @ 60°F 7.29
Color, ASTM D1500 5.0
Flash Point (COC), °C (°F) 227 (441)
Pour Point, °C (°F) -36 (-33)
Viscosity, Kinematic
cSt @ 40°C 119
cSt @ 100°C 15.3
Viscosity Index 138
Cold Cranking Viscosity (CCS), cP @ -20°C 5900
Sulfated Ash, ASTM D874, wt % 0.9
Total Base Number (TBN), ASTM D2896 10.2
Phosphorus, wt % 0.078
Zinc, wt % 0.086