Mercon ULV is Ford's latest generation automatic transmission fluid, the most recent in a long line of Mercon specifications that began with the original Mercon in 1987, having evolved through Mercon V, Mercon SP, and Mercon LV. (Wikipedia)
Formulation
Motorcraft Mercon ULV is an ultra-low viscosity fluid manufactured with high-viscosity index, premium-quality, hydroprocessed base oils and specially designed performance additives. (Motorcraft)
Key Performance Benefits
For transmissions designed for this fluid, it provides:
Improved fuel economy
Excellent shifting characteristics at high and low ambient temperatures
Protection against transmission shudder
Excellent thermal and oxidation performance