DEX/MERC ATF is a high-quality, conventional automatic transmission fluid designed to meet the exacting needs of older model vehicles requiring DEXRON-III or MERCON performance. It helps ensure smoother gear shifting, protects against wear and breakdown, and keeps your transmission running reliably even under high-stress conditions. Ideal for both professional service shops and DIY vehicle owners, this ATF keeps aging transmissions running like new. Whether you're servicing your GM, Ford, or import vehicle built before 2006, or need a reliable fluid for compatible power steering and hydraulic applications, Valvoline DEX/MERC ATF has you covered.