AMSOIL Signature Series Max-Duty 5W-30 Synthetic Diesel Engine Oil - Premium Protection for Heavy-Duty Trucks, Commercial Vehicles & High-Performance Engines | Ideal for Extreme Temperatures & Long Drain Intervals" (优化说明： 1. 保持核心关键词"AMSOIL Signature Series"和"5W-30 Synthetic Diesel Oil" 2. 添加"Max-Duty"突出产品特性 3. 增加使用场景描述：重型卡车、商用车、高性能引擎 4. 强调产品优势：极端温度保护和长换油周期 5. 符合SEO规范，包含相关搜索词)
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Description
SIGNATURE SERIES MAX-DUTY SYNTHETIC DIESEL OIL 5W-30
Maximum Engine Protection
Wear on rings and cylinder liners leads to increased oil consumption and loss of compression, resulting in reduced horsepower and fuel economy. Independent testing shows AMSOIL Signature Series Max-Duty delivers 6X more wear protection*, delivering the security of providing your diesel the extra protection it deserves.
