Guardol NG-D 15W40

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. 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