Delvac 1 ATF 668 Automatic Transmission Fluid

The Mobil Delvac 1™ ATF 668 is a fully synthetic transmission fluid engineered to meet the rigorous demands of modern heavy-duty automatic transmissions. Recommended by Allison Transmission, Inc., it is approved against the Allison TES 668® specification and offers backward compatibility for systems requiring Allison TES 295®. Its advanced synthetic base oil composition ensures excellent performance, even in extreme operating environments. This fluid delivers outstanding gear shifting and power transfer performance. Compared to conventional ATF fluids, Mobil Delvac 1™ ATF 668 features a high viscosity index and stability that protects against thermal breakdown at high operating temperatures while maintaining exceptional performance in sub-zero conditions. It also demonstrates extended drain capabilities, long-term friction retention, and low-temperature fluidity, contributing to improved overall transmission durability and cleanliness. Key features and benefits include enhanced, long-term frictional properties for smooth shifting and improved fuel economy, exceptional thermal and oxidation stability to keep transmissions clean and extend life, and outstanding film strength and anti-wear properties for reduced wear and longer transmission life. Its excellent low-temperature fluidity ensures prompt and reliable lubrication down to –54º C, and its shear stability leads to viscosity retention under severe operating conditions. Additionally, it is compatible with mineral ATF fluids, reducing concerns in top-off situations and offering excellent seal material leakage control.