Description Signature Series Fuel-Efficient Synthetic Automatic Transmission Fluid Designed for hard-working vehicles that live in severe service. Handles heat so well, you can confidently double your vehicle manufacturer’s severe-service drain interval with guaranteed AMSOIL protection. See the Product Data Bulletin for full details. RESERVE PROTECTION AGAINST HEAT AFTER 180,000 MILES ABOT test performed by independent lab based on total acid number (TAN). The transmission’s valve body is clean and virtually sludge-free following 180,000 severe-service miles. The clutch plates demonstrated only trace discoloration and earned a rating of "good," the highest possible, for deterioration/wear. PROTECTS AGAINST THERMAL BREAKDOWN Formulated with high concentrations of antioxidants, making it naturally heat resistant. Delivers extraordinary cold-flow properties. Helps improve shift response, energy efficiency and warm-up times.