ARCTIC-GRADE ENDURANCE: GUARDOL® XT® (FULL SYNTHETIC)

Ultimate Temperature Mastery. Elite Full-Synthetic Protection.

Mammoth is proud to supply Phillips 66® Guardol XT, a premium full-synthetic engine oil engineered for four-stroke diesel engines operating under the most severe conditions and extreme temperature swings. Designed to exceed API CK-4 standards, this 100% synthetic formulation provides the ultimate shield for modern low-emission engines, ensuring peak performance in both blistering heat and harsh winter climates where conventional and blend oils reach their limits.

WHY MAMMOTH TRUSTS GUARDOL® XT:

• Full-Synthetic Thermal Stability: Provides superior resistance to oxidation and thermal breakdown at high temperatures, ensuring the oil maintains its protective viscosity longer than any synthetic blend.

• Extreme Cold-Start Performance: The advanced synthetic base ensures exceptional low-temperature pumpability, allowing for rapid lubrication and reduced wear during the most punishing cold-weather starts.

• Liquid Titanium® Shield: Fortified with exclusive Liquid Titanium® additive technology, which creates a molecular-level sacrificial layer to protect critical engine components from abrasive wear.

• Soot & Deposit Mastery: Features world-class soot dispersancy to prevent oil thickening and abrasive wear, keeping your DPF and SCR aftertreatment systems clean and operational.