Lubricants & Hydraulic Fluids

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.

Features & Benefits

Nitrite free, Organic Acid Technology (OAT)
Compatible with all heavy duty OAT formulations

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Requires no initial Supplemental Coolant Additive (SCA) or Extender

Complete liner pitting and corrosion protection for aluminum and all other engine metals

When used as directed, Guardol OAT HD Coolant/Antifreeze provides long-lasting inhibition and corrosion protection

Check engine coolant level frequently and top off with Guardol OAT HD Coolant/Antifreeze when necessary. Guardol OAT HD Coolant/Antifreeze can also be used for flush and fill. To ensure best performance, the system should be drained and flushed thoroughly. A 50/50 mix of Guardol OAT HD Coolant/Antifreeze is recommended to ensure proper freezing/boilover protection. To provide the proper concentration level of inhibitors, never exceed 70%. Always check the specific maintenance and change-out intervals, coolant/antifreeze to water ratio, cooling system capacity, and service instructions recommended for your vehicle.

Meets or exceeds the following performance requirements:

ASTM D3306, D4985, D6210, D7583

TMC RP329, RP338

Cummins Bulletin 3666132

Cummins CES 14603

Navistar

Detroit Diesel 93K217

Freightliner 48-25878

CAT EC-1

Volvo 128603

SAE J1941

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