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Phillips 66® Guardol ECT (Emission Compatible Technology) Diesel Engine Oil with Liquid Titanium protection additive is a premium quality, part-synthetic API CK-4 engine oil developed for use in four-stroke cycle diesel engines designed to meet 2007 and later EPA on-highway exhaust emissions standards. It is specially formulated for compatibility with exhaust aftertreatment systems using diesel particulate filters (DPF), diesel oxidation catalysts (DOC) and/or selective catalytic reduction (SCR). It is backward serviceable for use in pre-2007 diesel engines.

P66 Guardol ECT w/Ti API CK-4 10W-30

SKU: 1077827
  • Features & Benefits

    • Excellent protection for newer low-emission diesel engines and older diesel engines
    • Specially formulated to protect exhaust aftertreatment systems
    • Exclusive Liquid Titanium protection additive provides enhanced oxidation resistance and protection against engine wear
    • Outstanding soot control for protection against abrasive wear and soot-induced oil thickening
    • Outstanding resistance to viscosity and thermal breakdown at high temperatures
    • Protects against sludge and varnish formation
    • Protects against rust and bearing corrosion
    • Excellent low-temperature pumpability with soot-laden oil
    • High shear stability
    • Good resistance to foaming and aeration


    • On-highway diesel trucks equipped with EGR and exhaust aftertreatment systems to meet 2007/2010 emissions standards
    • Older diesel equipment with conventional, non-EGR engines or ACERT engines
    • Off-highway construction, earth moving and mining equipment

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