Dex VI vs Merc V in an old f-150

[El_Schaf]

I have decided to to rather regular -every 10 to 15K- pan drain and fills on my old 97 f-150 with the 4r70 transmission.

It is factory speced for mercon, and from what I can tell, replacement fluids say that they are compatible with dexron or mercon. In fact, I think Valvoline Maxlife specs mercon/merconV and dexron III/VI.

Does this mean that one could use a dexron product in lieu of mercon? or is this ATF not as "good" at operating the transmissions as the specified fluids are? Thus inferring that dexron in a mercon tranny would be worse.

The reason Im asking, is that Ive heard very good things about Dex VI and if it was do-able, and since it costs the same as Merc V, I would think about substituting it for mercon on one of these drains.

 

[tig1]

In a Ford I would only use MV which is a very good fluid.

 

[tig1]

I just checked XMs site and no mention thar Dex 6 is Mercon or Ford compatable. If it was I'm sure it would be listed.

http://www.mobiloil.com/USA-English/MotorOil/Other_Products/Mobil_Dexron_VI_ATF.aspx

 

[Y_K]

SuperTech Mercon V is $3.77 at Wal-Mart and it is 'approved by Ford' as opposed as 'recommended' as some Mercon V listed fluids are.

 

[brandini]

Please write it out, MV (Mercon V)is becoming more confused with M-V which is a Mazda fluid.

 

[Maritime Storm]

He uses the Mazda fluid at work already, I'm pretty sure he would know the difference between two. Read his signature.