AMSOIL, Signature Series 5W-50 100% Synthetic Motor Oil, Universal Fit

AMSOIL Signature Series 5W-50 Fully Synthetic Motor Oil

AMSOIL Signature Series is the flagship motor oil engineered for those who demand the absolute best in engine protection. Designed to outperform competitors, this "over-engineered" formula provides a level of defense that far exceeds industry standards, ensuring your engine runs stronger and lasts longer. It creates a robust fluid film that keeps metal surfaces apart even under extreme stress, preserving horsepower and extending the life of critical components like pistons and cams.

Modern Turbocharged Gasoline Direct Injection (TGDI) engines face unique heat and pressure challenges. Signature Series is specifically formulated to handle these environments, neutralizing acids and preventing the deposits that lead to turbocharger failure. Proven to maintain original horsepower and torque even after 100,000 miles of testing, this is the ultimate choice for high-performance protection and high-viscosity requirements.

Features

• Unmatched Wear Protection: Provides 75% more engine protection against horsepower loss and wear than required by industry standards.
• Total LSPI Safeguard: Achieved a 100% protection rating against Low-Speed Pre-Ignition (LSPI) with zero recorded events across consecutive tests.
• Superior Turbo Protection: Protects turbochargers 72% better than required by the GM dexos1 Gen 2 specification, effectively resisting "turbo coking."
• Maximum Cleaning Power: Contains 50% more detergents than AMSOIL OE Motor Oil to fight sludge and maintain clean oil passages.
• Extreme Temperature Stability: Resists thermal breakdown and thickening, keeping pistons 40% cleaner than industry standards and ensuring safer cold starts.
• Extended Drain Intervals: Guaranteed protection for up to 25,000 miles, 700 hours of operation, or one year.

Spec

• Viscosity: 5W-50
• Service Life: Up to 25,000 miles or one year
• Performance Standards: Exceeds API SP, ILSAC GF-6A, and GM dexos1 Gen 2 specifications
• Sludge Protection: 90% better protection against sludge than industry requirements
• Ideal For: High-performance engines, towing/heavy-duty use, and Turbocharged Gasoline Direct Injection (TGDI)