Lubricants & Hydraulic Fluids

T5X® Heavy Duty Diesel Engine Oil

HEAVY-DUTY MONOGRADE DIESEL ENGINE OIL Phillips 66® T5X Heavy Duty Diesel Engine Oil is a high-quality diesel engine oil designed for use in a wide variety of applications, including off-highway diesel equipment, farm machinery, marine engines, 2-stroke cycle diesel engines (SAE 40 only) and mixed commercial fleets. It also may be used in some heavy-duty manual transmissions in trucks and buses.

Features & Benefits

Excellent soot control for protection against abrasive wear and soot-induced oil thickening
Protects against sludge and varnish formation
Protects against scuffing and wear
Protects against rust and bearing corrosion

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Good resistance to foaming and aeration

Low-ash content to minimize ash deposits and help keep intake ports clean (SAE 40)

2-stroke cycle diesel engines in bus fleets and marine fleets (SAE 40)

Off-highway trucks, heavy equipment and farm equipment

Light trucks and farm equipment with gasoline engines (SAE 30, SAE 50)

Heavy-duty manual transmissions in trucks and buses where the OEM specifies engine oil

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Guardol Oat HD Coolant/Antifreeze

HEAVY DUTY NITRITE FREE OAT EXTENDED LIFE COOLANT/ANTIFREEZE Phillips 66® Guardol OAT HD Coolant/Antifreeze is an Organic Acid Technology (OAT) that is intended for use and compatible with any OAT extended life heavy duty coolant/antifreeze in any diesel commercial vehicle engine or stationary engine with aluminum and other various engine metals. The advanced formulation is based on a concentrated blend of long-lasting inhibitors designed to provide up to 600,000 miles/12,000 hours* of protection against temperature extremes, corrosion, scale, rust and premature water pump failure. Guardol OAT HD Coolant/Antifreeze is available in both concentrate and prediluted 50/50 formulas. *TOP OFF: Will maintain extended life protection when added to any OAT extended life antifreeze/coolant. FLUSH AND FILL: Receive protection for up to 600,000 miles or 12,000 hours with a complete flush and fill using Guardol OAT HD Coolant/Antifreeze.

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