Valvoline’s Premium Blue Engine Oils are designed to provide advanced lubricant performance in modern, emissions treatment equipped diesel engines, including all types of Exhaust Gas Recirculation (EGR) and Diesel Particulate Filters (DPF). When used in conjunction with Ultra-Low Diesel Sulfur fuel, this product technology offers a long-life, extended drainage capability, balanced formulation which helps maximize engine durability and after-treatment cleanliness.