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GUARDOL FLEET EC® DIESEL ENGINE OIL
API CK-4 SYNTHETIC BLEND DIESEL ENGINE OIL FOR LOW-EMISSION ENGINES
THE FLEET STANDARD: GUARDOL® FLEET EC® (SYNTHETIC BLEND)
Heavy-Duty Reliability. Cost-Effective Performance.
Mammoth is proud to supply Phillips 66® Guardol Fleet EC, a high-quality synthetic blend engine oil designed to deliver robust protection for heavy-duty diesel engines. This "EC" (Emission Compatible) formulation is specifically balanced for fleets that require a dependable, high-volume oil that excels in both modern low-emission engines and older legacy units, ensuring consistent performance across mixed equipment profiles.
WHY MAMMOTH TRUSTS GUARDOL® FLEET EC:
Proven Wear Protection: Engineered with a balanced additive package that provides a durable film on critical engine parts, reducing metal-to-metal contact and extending component life.
Soot Control Excellence: Advanced dispersant technology keeps soot particles suspended, preventing the abrasive wear and oil thickening that can plague hard-working diesel engines.
Thermal Stability: The synthetic blend base provides enhanced resistance to oxidation compared to conventional oils, maintaining performance during high-temperature operations.
System Compatibility: Formulated to protect and preserve exhaust aftertreatment hardware, including DPF and SCR systems, to minimize downtime and costly service interruptions.
PRODUCT RESOURCES
PERFORMANCE
Proven Wear Protection: Engineered with a balanced additive package that reduces metal-to-metal contact and extends critical component life.
Soot Control Excellence: Advanced dispersant technology keeps soot suspended, preventing abrasive wear and sludge buildup in hard-working fleets.
Mixed-Fleet Compatibility: A versatile, cost-effective solution that protects both modern low-emission engines and legacy diesel units.
PROTECTION
Soot Dispersancy: Encapsulates soot particles to prevent them from clumping and causing abrasive wear on cylinders and rings.
Corrosion Shield: Provides a durable chemical barrier against moisture and combustion acids during engine downtime.
High-Volume Reliability: Delivers consistent, repeatable protection across entire fleets, regardless of engine age or manufacturer.
UPTIME
Consistent Fleet Uptime: Provides a reliable, middle-of-the-road solution that minimizes downtime across a wide variety of engine makes and ages.
Sludge Prevention: Keeps oil passages clear and filters clean, preventing the flow restrictions that lead to catastrophic engine failure.
Value-Driven Durability: Offers premium protection at a price point that makes frequent, preventative maintenance schedules economically viable.
COMPOSITION
RESISTANCE
PROTECTION
FEATURES & BENEFITS
Full-Synthetic Endurance: Provides the highest level of protection for severe-duty, high-load fleets.
Extreme Cold Flow: Ensures immediate lubrication to the turbo during winter startups on the Island.
Emission Protection: Low-ash technology protects aftertreatment systems from premature fouling.
Extended Service: Engineered for maximum drain intervals without sacrificing engine cleanliness.
Shear Stability: Retains its protective viscosity through the entire service life of the oil.
APPLICATIONS
Mixed fleets operating in extreme service conditions (Logging, Mining, Oil Field).
Late-model diesel engines requiring a full-synthetic CK-4.
Refrigerated trailers (Reefers) and stationary emergency power units.
On-highway fleets looking to maximize interval uptime.
Licenses & Approvals:
Guardol Fleet EC is licensed or OEM-certified for:
API Service CK-4, CJ-4, SN
Cummins CES 20086
Mack EOS-4.5
Volvo VDS-4.5
Renault VI RLD-3
Guardol Fleet EC meets or exceeds the requirements of:
Caterpillar ECF-3, ECF-2
Detroit Diesel DFS 93K222
Ford WSS-M2C171-F1
ACEA E9
MAMMOTH TECHNICAL TIP:
When "failure is not an option" in severe service, use Fleet EC. It gives you the cold-start flow of a 5W-40 with the hot-load protection of a 15W-40. It’s the ultimate "set it and forget it" oil for hard-working fleets.