PHILLIPS 66® GUARDOL SYN BLEND 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 specifically formulated to be compatible with exhaust aftertreatment systems that use 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.

Available in multiple sizes, including jugs, pails, and drums. Ideal for farms, fleets, and repair shops.