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2008 Mustang V6 ATF #5245844 10/21/19 09:58 AM
Joined: Feb 2010
Posts: 154
S
Sixxer Offline OP
OP Offline
S
Joined: Feb 2010
Posts: 154
I have used Amsoil previously, but I am looking to use something I can pickup at the store without issue. I’ve used Castrol import in the wife’s Mazda and can’t decide between Castrol or MaxLife. The car is at 135,000 and is driven mostly highway/stop and go traffic on the return from work. I haven’t noticed any transmission issues as of yet.

Thanks in advance

Last edited by Sixxer; 10/21/19 10:02 AM.

2008Mustang
Current fill: RoyalPurple
Current stash:15RoyalPurple 10QSUD 19Peak 5NxtGN 5SSAmsoil 5PU 10PP
Re: 2008 Mustang V6 ATF [Re: Sixxer] #5245860 10/21/19 10:15 AM
Joined: Jun 2002
Posts: 20,643
MolaKule Offline
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Posts: 20,643
Which Amsoil, ATF or ATL?

What is the ATF specification for transmission, Mercon LV?


"Dr. Larry Fleinhardt:
You know that it's considered unsolvable?
Charlie Eppes:
Well, certainly people who have failed to solve it might think that." From NUMB3RS
Re: 2008 Mustang V6 ATF [Re: Sixxer] #5245863 10/21/19 10:17 AM
Joined: Jun 2005
Posts: 13,760
bdcardinal Offline
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Posts: 13,760
Mercon V was the spec. The hardest part about these transmissions is filling the unit through the drain plug.


2014 Ford Mustang GT Track Pack
1995 Ford Mustang GT

Ford/Mazda Parts Counter
NRA Benefactor Member
Opinions expressed are my own.
Re: 2008 Mustang V6 ATF [Re: Sixxer] #5245870 10/21/19 10:20 AM
Joined: Feb 2010
Posts: 154
S
Sixxer Offline OP
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Joined: Feb 2010
Posts: 154
MERCON V Is the spec and yes they are a pain to service. My concern was that many of the fluids I see specify LV and not V and a quick google search tells me not to mix them. Some people have private messaged Valvoline and we’re told it would be okay, but why isn’t it listed on the bottle? Just looking for feedback from those that have had success Yes Amsoil ATF

Last edited by Sixxer; 10/21/19 10:21 AM.

2008Mustang
Current fill: RoyalPurple
Current stash:15RoyalPurple 10QSUD 19Peak 5NxtGN 5SSAmsoil 5PU 10PP
Re: 2008 Mustang V6 ATF [Re: Sixxer] #5245907 10/21/19 11:12 AM
Joined: Feb 2013
Posts: 3,792
Silverado12 Offline
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Posts: 3,792
I use NAPA Merc V. I'm assuming you have the special fitting to fill through the drain plug, because if not you'll need that. You can find them on eBay, etc. I think my 2010 GT took about 5 quarts with a new filter.


12 Chevy Silverado ext. cab LS, 2WD 4.3 auto
18 Mustang GT 5.0 auto
07 Harley Dyna Street Bob 96 c.i. 6 sp.
00 Mustang GT auto
Re: 2008 Mustang V6 ATF [Re: Sixxer] #5245925 10/21/19 11:27 AM
Joined: Oct 2014
Posts: 1,676
J
Jimzz Offline
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Maxlife should work fine, used it in several rangers and other ford vehicles that called for Mercon-V
If worried then supertech Mercon-V will work also.


yup
Re: 2008 Mustang V6 ATF [Re: Sixxer] #5246066 10/21/19 01:10 PM
Joined: Sep 2015
Posts: 4,345
69GTX Offline
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I'm in the same boat with my 2001 Lincoln. And in all the research I did I didn't see anything that suggested moving down from a Mercon V medium viscosity of 7.5 cSt @100 C to a LV (Dex 6) at 5.8 cSt was a great idea. Most regular Mercon V's are semi-synthetic and will shear down over a 20,000-30,000 mile OCI to about an LV spec. But there are full synthetic Merc V's that will stay up at 6.8-7.2 during their lives. Mobil 1 ATF and the Amsoil or Redline syn ATF's are of the correct viscosities and will not shear down much. MaxLIfe ATF is a great fluid....but it's not medium viscosity. Until I see a ton of evidence that the Merc V vehicles ran 150K-200K miles on "only" Max LIfe fluid, I'm not convinced it's a correct substitute.

Despite all that I use the Super Tech Mercon V (semi-syn) and have used Amalie Mercon V as well. The only ones that I know have the Ford Merc V approval are Super Tech and Castrol Merc V. I change out my ATF every 15K-25K miles based on color/appearance.

Whatever your Mercon V fluid is, change it every 20k-30k miles and you shouldn't have a problem. If you go to a Quick Lube place be aware they might put in the older Mercon/Dex 3. They've done that to me. So now I just change my own fluid 2-1/2 to 3 yrs.

Last edited by 69GTX; 10/21/19 01:10 PM.

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2001 Lincoln Cont 4.6L DOHC/ 50K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
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