Mercon V

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Jan 13, 2003 | 08:48 PM

Kevin1C

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Mercon V

I noticed that many of the big name synthetic manufacturers are NOT making a mercon V ATF. I got this response from one of them when I asked if they intend to.

"To build a Mercon V transmission fluid you would half to build it exactly the same as every one else is making it. There is no room in the spec to improve on that fluid. Now what is a Mercon V ATF fluid? Well Mercon V ATF is a synthetic ATF that uses a group 3 base oil. All Mercon V fluid must use a group 3 base oil. (deleted company name)uses a group 4 base oil. That will keep (deleted company name)from being listed as a Mercon V fluid. (deleted company and product name)works in Mercon V applications, we do recommend that you wait tell after your warranty is up before switching."

Has anyone information on this board about this?

Thanks

Kevin

2000 F-150 5.4L oFF rOAD

Jan 15, 2003 | 09:30 AM

MrBSS

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Mercon V

Sure wish I knew what "deleted company name" is!
MrBSS

Jan 15, 2003 | 09:44 AM

MrBSS

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Mercon V

Also like to know for sure if Mercon V is always "a synthetic ATF". Maybe, as Bill Clinton said, it depends on what you mean by "is" (or "synthetic")!

I believe Mark, the Ford engineer, had indicated it could be synthetic, or part synthetic, or "dino". But what is actually available? And more to the point, if I use any fluid labeled Mercon V, is that the best I can do, or is an additional claim ("synthetic", "Brand X", "Motorcraft/Ford") even better?

MrBSS

Jan 15, 2003 | 12:57 PM

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

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From: SE Florida

Mercon V

It depends. Some transmissions require MERCON V and some require MERCON. If you run the worng fluid you run the risk of damaging the transmission.

Both MERCON and MERCON V fluids are available in dino, blend, and full synthetics.

Jan 16, 2003 | 07:37 PM

MrBSS

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Mercon V

I have purchased Motorcraft Mercon V (Part # XT-5-QM/Ford Internal Ref. # 157746)from my local Ford dealer. The bottle does NOT indicate synthetic, but the parts man went to his book and says that this is the only Mercon V which Motorcraft lists (unlike the motor oil, where they do show synthetics, blends, and conventional). He called the trans technician over, who says that this IS synthetic.

I sure would appreciate it if anyone can confirm this one way or the other.

Thanks,
MrBSS

Jan 16, 2003 | 08:27 PM

Kevin1C

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Mercon V

As to why I didn't include the company name, I felt that it was a response to me as an individual and wouldn't be right to be publicly shared. Just me I guess. It wasn't Amzoil in case your wondering. "Synthetic" became a loose word as far as I'm concerned, thanks to Castrol. As most of you probably know Mobil one sued Castrol for calling there hydro cracked mineral oil a synthetic (which is a group three base oil). Mobil lost. A group 4 or 5 base oil is what most people think of as a synthetic, PAO, Diester, etc. So if the remarks from this company are true then a maker of Mercon V could formulate the fluid using mostly 3 base oil and it would be legal to call it fully synthetic. Happens in motor oils all the time.

Mobil one is a company that prides it's self on their high quality group 4 synthetic base oil. If you notice their ATF is not Mercon V certified either.

Makes me wonder...

But with lack of good data I won't risk it. It's hidden in the files of big business