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09 ford flex mercon lv? Ok or not enough lube? #4714356
04/02/18 04:45 PM
04/02/18 04:45 PM
Joined: Mar 2010
Posts: 25
Pennsylvania
jeremy34756 Offline OP
jeremy34756  Offline OP
Joined: Mar 2010
Posts: 25
Pennsylvania
Just got a 09 ford flex with the ford/gm 6f transmission. It calls for mercon Low viscosity. I always do fluid changes whenever I get a new/used car. This stuff seems like water. I know they run this to get more MPG but I always dumped a bottle of Lucas in to keep viscosity up in previous cars and it seemed to help alot lubricating in terms of metal pulp showing up. Just curious, Should I dump a bottle in when I do a fluid change or should I even use the mercon LV? and use SP? And is dexron 6 the same as mercon lv? I only ask cause at $9 a quart I find that price to be insane considering im gonna need 3 gallons to do a proper flush. Just been on mopar for awhile and lost touch with ford for the past 10 years.


Anything man made there is a flaw. You just got to find it.
Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: jeremy34756] #4714365
04/02/18 04:51 PM
04/02/18 04:51 PM
Joined: Dec 2011
Posts: 5,109
North Carolina
rooflessVW Online content
rooflessVW  Online Content
Joined: Dec 2011
Posts: 5,109
North Carolina
Dex VI and Mercon LV are more or less interchangeable. No reason to spend $9/qt.


"Zed's dead baby, Zed's dead."
Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: jeremy34756] #4714390
04/02/18 05:15 PM
04/02/18 05:15 PM
Joined: Jun 2014
Posts: 2,737
Phoenix, Arizona - USA
SirTanon Online content
SirTanon  Online Content
Joined: Jun 2014
Posts: 2,737
Phoenix, Arizona - USA


My 2010 Fusion has the same trans in it - the 6F35 - and I have run the Valvoline MaxLife stuff in it for about 70,000 miles without issue. Even the UOAs on the fluid I've drained out looked great. Shift quality has been excellent, too.

If you're worried, add a bottle of Lubegard Red.


2010 Ford Fusion SE - 2.5 liter/6F35 Trans - 266,000mi
2014 Nissan Altima SL - 2.5 liter/CVT - 60,000mi
Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: SirTanon] #4714401
04/02/18 05:30 PM
04/02/18 05:30 PM
Joined: Mar 2010
Posts: 25
Pennsylvania
jeremy34756 Offline OP
jeremy34756  Offline OP
Joined: Mar 2010
Posts: 25
Pennsylvania
Is it Mercon Lv equal and not V or SP? I only ask cause there is considerable differences between atf +3 and atf +4 when I ran mopar in terms of shudder. I ran ATf +4 in a older ultradrive which called for atf +3 and it thanked me for it big time. But my question is this stuff is super thin. To much for me to think thats its sole purpose is for the EPA and not the actual life of the trans. Also been watching videos of the fluid looking burnt in 10k miles. but they explain its normal.

Last edited by jeremy34756; 04/02/18 05:33 PM.

Anything man made there is a flaw. You just got to find it.
Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: jeremy34756] #4714404
04/02/18 05:33 PM
04/02/18 05:33 PM
Joined: Apr 2017
Posts: 1,445
San Rafael, CA
dogememe Offline
dogememe  Offline
Joined: Apr 2017
Posts: 1,445
San Rafael, CA
i happily run genuine motorcraft mercon lv in my 6f35 in my escape and it's happy. and no additives, ever.


2010 Ford Escape 2.5 ~91K Miles: AMSOIL SS 5W-30, AMSOIL SS FE ATF.
1995 Chevy Silverado 5.7 ~277K Miles: Delo 10W-30, AMSOIL OE MV ATF.
AMSOIL
Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: jeremy34756] #4714405
04/02/18 05:35 PM
04/02/18 05:35 PM
Joined: Apr 2017
Posts: 1,445
San Rafael, CA
dogememe Offline
dogememe  Offline
Joined: Apr 2017
Posts: 1,445
San Rafael, CA
i happily run genuine motorcraft mercon lv in my 6f35 in my escape and it's happy. and no additives, ever.


2010 Ford Escape 2.5 ~91K Miles: AMSOIL SS 5W-30, AMSOIL SS FE ATF.
1995 Chevy Silverado 5.7 ~277K Miles: Delo 10W-30, AMSOIL OE MV ATF.
AMSOIL
Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: jeremy34756] #4714442
04/02/18 06:15 PM
04/02/18 06:15 PM
Joined: Jan 2009
Posts: 13,983
Illinois
tig1 Offline
tig1  Offline
Joined: Jan 2009
Posts: 13,983
Illinois
I changed my 2017 Fusion and used MC Mercon LV at 30K and plan to do a D-F every 30K after that.


2007 Ford Fusion 235,000 miles
M1 0-20 EP
2017 Ford Fusion 60K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and Valvoline LV
M1 10-30 in all OPE
MC filters

Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: jeremy34756] #4714471
04/02/18 06:37 PM
04/02/18 06:37 PM
Joined: Aug 2004
Posts: 2,019
5600 feet elevation, Arizona
double vanos Offline
double vanos  Offline
Joined: Aug 2004
Posts: 2,019
5600 feet elevation, Arizona
Just googled mercon LV and the specs are: flash point: 421 degrees f, pour point: minus 54f.

Seems pretty stout to me......


Sabine Schmitz is the Queen of the 'Ring; Svetlana Kapanina is the Queen of the SKIES...
Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: SirTanon] #4714488
04/02/18 06:45 PM
04/02/18 06:45 PM
Joined: Mar 2008
Posts: 7,343
USA
slacktide_bitog Offline
slacktide_bitog  Offline
Joined: Mar 2008
Posts: 7,343
USA
Originally Posted By: SirTanon


My 2010 Fusion has the same trans in it - the 6F35 - and I have run the Valvoline MaxLife stuff in it for about 70,000 miles without issue. Even the UOAs on the fluid I've drained out looked great. Shift quality has been excellent, too.

If you're worried, add a bottle of Lubegard Red.


approved

Maxlife will work fine in your Flex with no problems smile

Many aftermarket ATF's are licensed for both Dexron VI and Mercon LV. Walmart's house brand ST synthetic LV AFT is licensed for both. Castrol's synthetic ATF is also formally approved by both Ford and GM. A few times a year, the parts stores put the Castrol ATF on sale for $5/qt.

And since Ford and GM worked together on that transmission, and GM calls fort Dexron VI, there is no problem with using Dexron VI in that transmission thumbsup

The good news is that it has a drain plug, so changing it should be easy smile

Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: double vanos] #4714498
04/02/18 06:51 PM
04/02/18 06:51 PM
Joined: Mar 2010
Posts: 25
Pennsylvania
jeremy34756 Offline OP
jeremy34756  Offline OP
Joined: Mar 2010
Posts: 25
Pennsylvania
Incredible Synthetic qualities. But again why does it look burnt after 10-15k miles in the 6F? I know fords always ran hot on there autos. There mercon V blooded Ax** trans axles turned brown very quick and had failed stuck shift solenoids quite bad for me anyway. Never dumped any lubrication modifier like lucas in them. The mopars I did. And it seemed to really help.

Last edited by jeremy34756; 04/02/18 06:53 PM.

Anything man made there is a flaw. You just got to find it.
Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: jeremy34756] #4714510
04/02/18 07:06 PM
04/02/18 07:06 PM
Joined: May 2012
Posts: 1,839
The land of USA-made Subies!
SubieRubyRoo Offline
SubieRubyRoo  Offline
Joined: May 2012
Posts: 1,839
The land of USA-made Subies!
Use Maxlife and Lubegard red. Will work great, change between 30-50k. Stay away from Lucas.

Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: SubieRubyRoo] #4714544
04/02/18 07:42 PM
04/02/18 07:42 PM
Joined: Mar 2010
Posts: 25
Pennsylvania
jeremy34756 Offline OP
jeremy34756  Offline OP
Joined: Mar 2010
Posts: 25
Pennsylvania
Thanks for the input will look at max life. If anybody can comment on a lubrication modifier would be greatly appreciated, I don't have a ASE license but have just learned over the years. I find it stupid to run liquid with almost no viscosity in your transmission other than a new attempt for the manufacture to meet EPA standards. The clutch packs are like brake pads and will wear to the point of needing replaced/rebuilt unless they are protected. The black in the fluid and the catch magnet is the clutch pack wearing away and burnt fluid is a result of them being exposed to that high temp. But thanks for the input Everyone.


Anything man made there is a flaw. You just got to find it.
Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: jeremy34756] #4715118
04/03/18 11:08 AM
04/03/18 11:08 AM
Joined: Jun 2014
Posts: 2,737
Phoenix, Arizona - USA
SirTanon Online content
SirTanon  Online Content
Joined: Jun 2014
Posts: 2,737
Phoenix, Arizona - USA
Originally Posted By: jeremy34756
Incredible Synthetic qualities. But again why does it look burnt after 10-15k miles in the 6F? I know fords always ran hot on there autos.

I can answer this.

The 6F35 trans is pretty hard on trans fluid, just by its nature. That's not to say it's badly designed, just that it's a hard-working trans, which is also why it requires a solid fluid like the LV that is specced for it.

In addition, Mercon LV tends to darken early on, which I suspect is due to its additives doing their job. I should point out, however, that this is simply darkening, not burning. There's a very distinct difference here. Darkened Mercon LV is still perfectly functional and still doing its job.

I have yet to do a drain & fill on my 6F35 (done regularly every 25,000 - 30,000 miles) where the drained fluid was not a dark purple-ish color, but it has also never smelled burnt. UOAs performed on this drained fluid have always shown that it is still in decent condition. Realistically, I could probably go 40k miles per drain/fill, but I do it at ~30k because it is the prevailing opinion among those in the know, and because it keeps the trans clearer of contamination.


Originally Posted By: jeremy34756
Never dumped any lubrication modifier like lucas in them. The mopars I did. And it seemed to really help.

Personally, I steer clear of any Lucas products made to go into engines and transmissions.. In terms of Trans additives, LubeGard Red is pretty highly regarded on here.. You might give it a try in the future.


2010 Ford Fusion SE - 2.5 liter/6F35 Trans - 266,000mi
2014 Nissan Altima SL - 2.5 liter/CVT - 60,000mi
Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: jeremy34756] #4715123
04/03/18 11:11 AM
04/03/18 11:11 AM
Joined: Dec 2002
Posts: 4,256
The Garden State
Whimsey Online content
Whimsey  Online Content
Joined: Dec 2002
Posts: 4,256
The Garden State
I have a 2017 Explorer that has that 6F35 transmission. Thank goodness it's a piece of cake to do a drain and fill. I bought a 12 qt case of Motorcraft Mercon LV from Rock Auto for $60 delivered. Being an*l and a longtime member of BITOG I did a drain and fill at 12,200 miles grin. I'll do another at 25,000 miles on the odo and then every 25,000 miles after that. The Mercon LV fluid turns very dark early but they say that does not indicate fluid breakdown, unless it hasn't been changed in a while. It's the nature of the fluid and transmission. Though doing a drain and fill every 25-30,000 miles is a good idea with these transmissions, especially the earlier year ones, which could be a bit wonky. If your Flex is an all wheel drive model I'd be real concerned with the fluid or lack of "fluid" in the PTU, especially the early models. They were claimed to have "lifetime fills", NOT! The Motorcraft 75W-140 could turn solid and not lubricate in less than 50,000 miles crzy.

Whimsey

Last edited by Whimsey; 04/03/18 11:14 AM.
Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: Whimsey] #4715366
04/03/18 03:51 PM
04/03/18 03:51 PM
Joined: Mar 2010
Posts: 25
Pennsylvania
jeremy34756 Offline OP
jeremy34756  Offline OP
Joined: Mar 2010
Posts: 25
Pennsylvania
It is in fact a AWD. And I believe it has the 6F50 transmission. What can you recommend on the PTU? I hear they dont hold enough oil. I been a schaffers oil person myself but any suggestion is appreciated. I will check out the additive listed above.


Anything man made there is a flaw. You just got to find it.
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