From 2003 owners manual... "Some transmission fluids may be labeled as dual usage, such as MERCON and MERCON V. These dual usage fluids are not to be used in an automatic transmission that requ...
There was a TSB issued by Ford years ago that states that Mercon V is OK to use where Mercon was originally used. The Mercon SP is completely different and should not be used where Mercon and Mercon V are used!