Mobil Delvac 1 ATF is a fully synthetic automatic transmission fluid that is designed to meet the demanding requirements of modern heavy duty automatic transmissions. It is recommended by Allison Transmission, Inc. and is approved against the Allison TES-295 Specification. Mobil Delvac 1 ATF is made with a synthetic base oil that provides excellent performance even in some of the harshest of operating conditions. It offers outstanding gear shifting and power transfer performance, and helps to improve overall transmission efficiency, smooth shifting performance, and fuel economy. Mobil Delvac 1 ATF also has exceptional thermal and oxidation stability, which helps to keep transmissions clean and extend their life. It has outstanding film-strength and anti-wear properties, which helps to reduce wear and extend transmission life. Mobil Delvac 1 ATF also has excellent low-temperature fluidity, which provides prompt and reliable lubrication at sub-zero ambient temperatures down to 54 C. M