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#4714356 - 04/02/18 05:45 PM 09 ford flex mercon lv? Ok or not enough lube?
jeremy34756 Offline


Registered: 03/25/10
Posts: 25
Loc: 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.

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#4714365 - 04/02/18 05:51 PM Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: jeremy34756]
rooflessVW Online   content


Registered: 12/24/11
Posts: 3675
Loc: North Carolina
Dex VI and Mercon LV are more or less interchangeable. No reason to spend $9/qt.
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"Zed's dead baby, Zed's dead."

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#4714390 - 04/02/18 06:15 PM Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: jeremy34756]
SirTanon Offline


Registered: 06/23/14
Posts: 1987
Loc: 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 - 253,000mi
2014 Nissan Altima SL - 2.5 liter/CVT - 52,000mi

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#4714401 - 04/02/18 06:30 PM Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: SirTanon]
jeremy34756 Offline


Registered: 03/25/10
Posts: 25
Loc: 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.


Edited by jeremy34756 (04/02/18 06:33 PM)
_________________________
Anything man made there is a flaw. You just got to find it.

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#4714404 - 04/02/18 06:33 PM Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: jeremy34756]
dogememe Offline


Registered: 04/15/17
Posts: 452
Loc: SF BAY AREA, CA
i happily run genuine motorcraft mercon lv in my 6f35 in my escape and it's happy. and no additives, ever.
_________________________
2007 Crown Vic 4.6 ~122K: Daily Driver
2010 Escape 2.5 ~66K: Rented on Turo
1997 Suburban 5.7 ~213K: Storage Unit

7K Mile OCIs with Valvoline Advanced Synthetic/SynPower 5W-30

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#4714405 - 04/02/18 06:35 PM Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: jeremy34756]
dogememe Offline


Registered: 04/15/17
Posts: 452
Loc: SF BAY AREA, CA
i happily run genuine motorcraft mercon lv in my 6f35 in my escape and it's happy. and no additives, ever.
_________________________
2007 Crown Vic 4.6 ~122K: Daily Driver
2010 Escape 2.5 ~66K: Rented on Turo
1997 Suburban 5.7 ~213K: Storage Unit

7K Mile OCIs with Valvoline Advanced Synthetic/SynPower 5W-30

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#4714442 - 04/02/18 07:15 PM Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: jeremy34756]
tig1 Offline


Registered: 01/03/09
Posts: 13528
Loc: 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 224,000 miles
M1 0-20 EP
2017 Ford Fusion 47K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters


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#4714471 - 04/02/18 07:37 PM Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: jeremy34756]
double vanos Offline


Registered: 08/05/04
Posts: 1825
Loc: 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......
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Sabine Schmitz is the Queen of the 'Ring; Svetlana Kapanina is the Queen of the SKIES...

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#4714488 - 04/02/18 07:45 PM Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: SirTanon]
slacktide_bitog Offline


Registered: 03/20/08
Posts: 5854
Loc: 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

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#4714498 - 04/02/18 07:51 PM Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: double vanos]
jeremy34756 Offline


Registered: 03/25/10
Posts: 25
Loc: 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.


Edited by jeremy34756 (04/02/18 07:53 PM)
_________________________
Anything man made there is a flaw. You just got to find it.

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#4714510 - 04/02/18 08:06 PM Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: jeremy34756]
SubieRubyRoo Online   content


Registered: 05/14/12
Posts: 889
Loc: Winchester, Indiana
Use Maxlife and Lubegard red. Will work great, change between 30-50k. Stay away from Lucas.

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#4714544 - 04/02/18 08:42 PM Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: SubieRubyRoo]
jeremy34756 Offline


Registered: 03/25/10
Posts: 25
Loc: 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.

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#4715118 - 04/03/18 12:08 PM Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: jeremy34756]
SirTanon Offline


Registered: 06/23/14
Posts: 1987
Loc: 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 - 253,000mi
2014 Nissan Altima SL - 2.5 liter/CVT - 52,000mi

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#4715123 - 04/03/18 12:11 PM Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: jeremy34756]
Whimsey Offline


Registered: 12/22/02
Posts: 4018
Loc: 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


Edited by Whimsey (04/03/18 12:14 PM)

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#4715366 - 04/03/18 04:51 PM Re: 09 ford flex mercon lv? Ok or not enough lube? [Re: Whimsey]
jeremy34756 Offline


Registered: 03/25/10
Posts: 25
Loc: 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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