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PREMIUM AUTOMOTIVE PERFORMANCE: SHIELD® CHOICE (SYNTHETIC BLEND) Engineered for Versatility. Built for Longevity.
Mammoth is proud to supply Phillips 66® Shield Choice, the high-performance synthetic blend solution for modern gasoline engines. Designed for a wide range of applications—from turbocharged direct injection cars to light-duty work trucks—this oil provides a robust balance of protection and efficiency. Whether you are maintaining a personal vehicle or a commercial fleet, Shield Choice is engineered to handle the thermal stress of daily operation while meeting the latest industry warranty standards.
WHY MAMMOTH TRUSTS SHIELD® CHOICE:
Advanced Wear Protection: Specifically engineered to combat Low-Speed Pre-Ignition (LSPI), providing a specialized shield for high-tech turbocharged gasoline direct injection engines.
Thermal & Viscosity Stability: Resists breakdown and foaming even under extreme service, ensuring your oil maintains its thickness and lubricating properties from one service interval to the next.
Internal Engine Cleanliness: Our formulation actively minimizes the formation of sludge and varnish, keeping vital engine components clean and reducing long-term maintenance costs.
Fuel Economy & Compatibility: Meets "Resource Conserving" standards for improved fuel efficiency and is fully compatible with ethanol-blended fuels up to E85, making it a versatile choice for modern flex-fuel fleets.

PRODUCT RESOURCES
PERFORMANCE
Enhanced Thermal Stability: Synthetic blend chemistry provides a higher level of resistance to oil thickening and thermal breakdown compared to standard conventional oils.
Fuel Economy Mastery: Meets "Resource Conserving" standards to help improve fuel efficiency and maintain peak engine performance for gasoline-electric hybrids.
Stable Viscosity Control: Resists foaming and thinning under extreme service, ensuring consistent oil pressure and reliable lubrication through the entire service interval.
PROTECTION
Advanced LSPI Defense: Specifically formulated to protect turbocharged gasoline direct-injection engines (TGDI) from low-speed pre-ignition damage.
Corrosion & Rust Shield: Provides a robust barrier against bearing corrosion and rust, essential for vehicles operating in the humid West Coast climate.
Warranty-Ready Protection: Exceeds ILSAC GF-7A requirements, ensuring your fleet stays compliant with new car warranty standards.
UPTIME
Sludge & Varnish Control: Actively minimizes internal engine deposits, keeping your equipment cleaner and reducing the risk of unscheduled shop time.
Broad Fleet Versatility: A reliable multi-application oil that simplifies inventory for mixed fleets of modern and older gasoline vehicles.
Proven Durability: Engineered to withstand the stress of daily commutes and light-duty commercial use, maximizing the time between major engine overhauls.
COMPOSITION
RESISTANCE
PROTECTION
FEATURES & BENEFITS
Wear Control: Enhanced friction-reducing additives protect critical engine parts during high-load acceleration.
Thermal Stability: Synthetic blend chemistry outlasts conventional oils, resisting breakdown in high-heat summer driving.
Clean-Running Tech: Robust detergent package maintains piston cleanliness and prevents ring sticking.
Corrosion Guard: Specialized inhibitors shield internal metal surfaces from moisture and combustion acids.
Fuel Economy: Formulated to reduce internal fluid friction, contributing to improved fuel efficiency.
APPLICATIONS
Domestic and import gasoline-fueled passenger cars and light trucks.
Light-duty fleet vehicles that see high idle times and frequent stops.
Older engines where a transition to full synthetic isn't yet required.
Naturally aspirated gasoline engines in SUVs and minivans.
Licenses & Approvals:
Shield Choice Synthetic Blend Motor Oil is licensed for:
ILSAC GF-7A (except SAE 10W-40 and 20W-50)
API Service SQ with Resource Conserving (except SAE 10W-40 and SAE 20W-50 which are API SQ only)
Shield Choice Synthetic Blend Motor Oil meets or exceeds the requirements of:
Chrysler MS-6395 (except SAE 10W-40 and 20W-50)
Ford WSS-M2C970-A1 (SAE 5W-20)
Ford WSS-M2C971-A1 (SAE 5W-30)
Ford WSS-M2C972-A1 (SAE 0W-20)
GM6094M (obsolete specification)
MAMMOTH TECHNICAL TIP:
The perfect "middle ground" for fleet vehicles that see high idle times. It gives you synthetic-level cold starts without the full-synthetic price tag.
