After reading a few threads here, I've noticed that lincoln uses Mercon V as there choice of fluid, my question is, Mobil 1 has a synthetic transmission fluid, would that hurt my car (LS) if i was to use that ?
Ford's recommendation for 5R55E transmission services is every 30 months under "severe usage" or 60 months/50,000 miles.
The usual qwikky-shop "drop-the-pan" service is not advised. 5R55E transmissions hold 12 quarts and have no torque convertor drain. The standard style of tranny service will only replace 2 1/2 to 3 quarts of fluid. This becomes very important if you decide to step up to synthetic. ALL fluid must be removed with a power flushing machine before being replaced.
Mixing conventional and synthetic fluids serves no purpose, and may actually create unnecessary problems.