MAMMOTH PETROLEUM
778-370-3330
THE CLASSIC STRENGTH: PHILLIPS 66® T5X®
Single-Grade Precision. High-Load Resilience.
Mammoth is proud to supply Phillips 66® T5X, a high-quality monograde diesel engine oil designed for use in engines where the manufacturer specifies a single-grade lubricant. Engineered to provide elite protection for both turbocharged and naturally aspirated engines, T5X is the trusted choice for heavy-duty construction equipment, marine applications, and legacy diesel engines requiring a stable, high-viscosity-index oil.
WHY MAMMOTH TRUSTS T5X:
Superior Shear Stability: As a monograde oil, it provides exceptional resistance to viscosity breakdown, maintaining a consistent lubricating film under constant, high-pressure loads.
Oxidation & Deposit Control: Advanced detergent-dispersant chemistry minimizes the formation of sludge and varnish, keeping internal engine components factory-clean.
Corrosion Protection: Formulated to protect against rust and bearing corrosion, ensuring the longevity of critical engine parts even during periods of intermittent use.
Broad Application Range: Available in specific weights (10W, 30, 40, 50) to meet the precise requirements of transmissions, hydraulic systems, and older two-stroke diesel engines.
PRODUCT RESOURCES
PERFORMANCE
Superior Shear Stability: Monograde formulation provides exceptional resistance to viscosity breakdown under constant, heavy-duty loads.
Deposit Control: Specialized detergent chemistry minimizes sludge and varnish to keep legacy engine components factory-clean.
Versatile Application: Trusted for heavy-duty construction, marine, and hydraulic systems requiring a stable, single-grade lubricant.
PROTECTION
Unchanging Film Strength: The single-grade formulation provides a constant, predictable lubricating barrier that will not shear under heavy, steady-state loads.
Legacy Engine Care: Specifically balanced to provide the exact detergency levels required for older two-stroke and four-stroke engines without causing seal leaks.
Component Cleanliness: High-temperature stability prevents the formation of lacquer and varnish on pistons and liners, maintaining engine efficiency.
UPTIME
Mechanical Simplicity: In engines designed for monogrades, this oil provides the exact film thickness required for the longest possible component life.
High-Load Stability: Perfect for stationary or slow-moving equipment that runs at a constant RPM, providing steady, reliable protection 24/7.
Inventory Efficiency: Available in specific SAE grades to serve as a dual-purpose fluid for engines, certain transmissions, and hydraulic systems.
COMPOSITION
RESISTANCE
PROTECTION
FEATURES & BENEFITS
Mono-grade Stability: Provides consistent film strength in applications where multi-viscosity oils are not recommended.
Bore Polish Resistance: Specifically formulated to prevent cylinder liner polishing in older diesel designs.
Piston Cleanliness: Controls carbon and lacquer buildup on piston rings and lands.
Corrosion Defense: Protects yellow metals and bearings from corrosive combustion by-products.
High Shear Resistance: Maintains original viscosity even under extreme mechanical shearing.
APPLICATIONS
Two-stroke and four-stroke diesel engines in older trucks and marine vessels.
Transmissions and hydraulic systems requiring a mono-grade engine oil.
Older Detroit Diesel two-cycle engines (Series 53, 71, and 92).
Stationary power units and heavy-duty manual transmissions.
Licenses & Approvals:
T5X is licensed or OEM-certified for:
API Service CF, SL (SAE 30, 40, 50)
API Service CF-2 (SAE 30, 40, 50)
T5X meets or exceeds the requirements of:
Detroit Diesel DFS 93K216 (Monograde)
Allison C-4
Vickers M-2950-S
Caterpillar TO-2 (obsolete, but maintained for legacy equipment)
MAMMOTH TECHNICAL TIP:
The "Red Seal" choice for classic Detroit Diesel two-strokes. These engines "slobber" and suffer liner damage if you use modern multi-grades. Stick with T5X to keep those legendary two-cycles breathing clean and pulling hard.