Phillips 66® Guardol Eco Diesel Engine Oil, formerly known as Firebird Heavy Duty EC, is an environmentally responsible 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 (DPFs), diesel oxidation catalysts (DOCs) and/or selective catalytic reduction (SCR). It is backward serviceable for use in pre-2007 diesel engines.
GUARDOL ECO® DIESEL ENGINE OIL
API CK-4 DIESEL ENGINE OIL FORMULATED WITH RE-REFINED BASE STOCKS
Links of Interest
Features & Benefits
- Excellent protection for newer low-emission diesel engines and older diesel engines
- Specially formulated to protect exhaust aftertreatment systems
- Protects against particulate filter plugging
- Excellent soot control for protection against abrasive wear and soot-induced oil thickening
- Excellent resistance to viscosity and thermal breakdown at high temperatures
- Protects against sludge and varnish formation
- Protects against rust, bearing corrosion and wear
- Good resistance to foaming and aeration
- Lessens the environmental impact of used oil disposal
Applications
- 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
Technical Details
- 15W-40
- 15W-40
Licenses & Approvals
Guardol Eco is licensed or OEM-certified for: #API Service CK-4, CJ-4, CI-4 PLUS, SN #Cummins CES 20086 #Detroit Diesel DFS 93K222 #Ford WSS-M2C171-F1
Guardol Eco meets or exceeds the requirements of: #Caterpillar ECF-3, ECF-2, ECF-1-a #Mack EOS 4.5 #Mercedes-Benz Sheet 228.31 #Volvo VDS-4.5 #Diesel engines manufactured by OEMs not listed above, where the OEM specifies API CK-4 engine oil
Additional Details
| SAE Grade | 15W-40 |
| Specific Gravity @ 60°F | 0.8774 |
| Density, lbs/gal @ 60°F | 7.31 |
| Color, ASTM D1500 | L 4.0 |
| Flash Point (COC), °C (°F) | 235 (455) |
| Pour Point, °C (°F) | -31 (-24) |
| Viscosity, Kinematic | |
| cSt @ 40°C | 111 |
| cSt @ 100°C | 15 |
| Viscosity Index | 139 |
| Cold Cranking Viscosity, cP @ -20°C | 5400 |
| High-Temp/High-Shear Viscosity, cP @ 150°C | 4.2 |
| Sulfated Ash, ASTM D874, wt % | 0.99 |
| Total Base Number (TBN), ASTM D2896 | 9.7 |
| Zinc, wt % | 0.125 |
| Re-refined Content, Finished Oil, vol % | 100 |






