Synthetic oil and dinosour oil compatibility?

Going to change fluid in wife's 2005 Ford Escape automatic transmission and I am wondering how compatible would synthetic Mercron V fluid be with oil that will remain in the transmission because you never get all the old fluid out with one change. Anyone done this?

I amnot sure about transmission fluid but I have mixed both in m,y engine and there is no problem read the label on the can/bottle. The motor oil says they are fully compatible.

Mercon V is a semi-synthetic fluid. What product are you thinking of using?

Are you sure it doesn't have Mercron V already?

Ford TSB on Mercon to Mercon V is TSB 06-14-4.

http://www.aa1car.com/library/atf.htm

aaccroding to them:

Type F -- Introduced by Ford in 1967 for their automatics. Also used by Toyota.

Type CJ -- Special fluid for Ford C6 transmissions. Similar to Dexron II. Must not be used in automatics that require Type F. Can be replaced with Mercon or Mercon V.

Type H -- Another limited Ford spec that differs from both Dexron and Type F. Can be replaced with Mercon or Mercon V.

Mercon -- Ford fluid introduced in 1987, very similar to Dexron II. Okay for all earlier Fords except those that require Type F. As of July 1, 2007, the production and licensing of Mercon ATF by Ford ends. Ford says applications that require Mercon ATF can now be serviced with Mercon V. See Ford TSB 06144 for more information.

Mercon V -- Replaces Mercon. Introduced in 1997 for Ranger, Explorer V6 and Aerostar, and 1998 & up Windstar, Taurus/Sable and Continental. This is the current ATF for most late model Ford products. See Ford TSB 06144 for more information.



According to them your transmission already had Mercon V in it.







Mercon SP -- Latest friction-modified ATF for Ford TorqShift Transmissions only. Do NOT use in transmissions that require Mercon or Mercon V. See Ford TSB 06144 for more information.