Duralec™ Diesel Optimizer HD
Synthetic Diesel Fuel Optimizer
Royal Purple’s Duralec Diesel Additive HD is a fully synthetic, all-season additive that improves diesel engine operation and reduces fuel costs.
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Duralec Diesel Additive HD is formulated for year round use in all types of medium and heavy duty diesel engines, and is compatible with any type or grade of diesel fuel, including #1 diesel and #2 diesel, biodiesel and ultra-low-sulfur diesel (ULSD).
Duralec Diesel Additive HD is specifically formulated to solve problems associated with today’s new HPCR (High Pressure Common Rail) diesel injection systems. Safe for use with all types of diesel exhaust emission systems equipment, including diesel particulate filters (DPFs) and catalytic converters. Do not pour into Diesel Exhaust Fluid.