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Pat_Whalen
super gas


Reged: Aug 05 2003
Loc: Mesa, AZ
727 fluid- What to use?
      #5842357 - Wed Mar 03 2010 01:36 AM

I tried a search but it didn't give me too many solid results.

Some people say Type F in a street/strip application. Other's say Type F is too old and doesn't have to additives required to last long.

Some say Dexron is the approved fluid. What I was able to find locally was Dex/Merc.

Transmission is going behind a stock/mild 440 in a heavy Ramcharger. If it makes a difference, I don't want to have to tear down the trans every couple thousand miles and the truck will be driven in Arizona (6 months out of the year might be pushing 100 degrees.)

Thanks in advance.

Cheers,
Pat



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Lew
enthusiast


Reged: Feb 05 2007
Loc: Coolville, Ohio
Re: 727 fluid- What to use? [Re: Pat_Whalen]
      #5842362 - Wed Mar 03 2010 01:43 AM

I asked this ? not long ago, most of them said type (F), lets see what you stir up. I already put the F in mine.

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Frankenduster
Sloppy drunk and stupid is no way to go thru life


Reged: Feb 15 2010
Loc: Granite Bay CA
Re: 727 fluid- What to use? [Re: Pat_Whalen]
      #5842364 - Wed Mar 03 2010 01:49 AM

When in doubt, refer to the FSM. The new MOPAR ATF+4 will work fine, but it has detergents that the older transmissions may not need. PLUS it costs more. The Dexron/Mercon is the default replacement for the Dexron, Dexron II and Dexron/Mercon. Mopar Action recommended Type F for better shift quality and less slippage. I've often wondered if it is a problem to switch types on a used trans. It is nearly impossible to fully evacuate the old fluid without total teardown. Would a 95% to 5% mix cause trouble?

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WILD BILL
Huggy Blue Bill


Reged: Dec 05 2007
Loc: BROOK PARK, OH
Re: 727 fluid- What to use? [Re: Frankenduster]
      #5842909 - Wed Mar 03 2010 10:51 AM

I used Type F for years till I switched to Amsoil in the race car. Still use Type F in the 72.

--------------------
WILD RACING

71 CHARGER, 9.953 @ 132.66 BEST PASS SO FAR

Power by Koffel's Place


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MisterFiberglass



Reged: Jul 04 2008
Loc: WINNING - in PaRaDiSe ....Bra...
Re: 727 fluid- What to use? [Re: WILD BILL]
      #5842959 - Wed Mar 03 2010 11:21 AM

ANOTHER vote furr Type F .....

And to the guyz that use Mopar4 and AMSOIL .... must be nice to have that COIN to throw-around when it is not necessary !

--------------------
no, No, NO - not a vaca with the nUtTy FrUiTcAkE oleHAM - - he is so nutty if he ate a can of Planters cashews - he could be charged with CANNIBALISM ....


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aarcuda
I Live Here


Reged: Mar 17 2003
Loc: the boonies
Re: 727 fluid- What to use? [Re: MisterFiberglass]
      #5842992 - Wed Mar 03 2010 11:41 AM

type F

--------------------
It's got a cop motor, a 440 cubic inch plant, it's got cop tires, cop suspensions, cop shocks. It's a model made before catalytic converters so it'll run good on regular gas.


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Pat_Whalen
super gas


Reged: Aug 05 2003
Loc: Mesa, AZ
Re: 727 fluid- What to use? [Re: aarcuda]
      #5843035 - Wed Mar 03 2010 12:15 PM

So even though this isn't planned as a strip vehicle, type F is still advised? Any rumors to the fact that it doesn't hold up very well to constant high heat?

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MisterFiberglass



Reged: Jul 04 2008
Loc: WINNING - in PaRaDiSe ....Bra...
Re: 727 fluid- What to use? [Re: Pat_Whalen]
      #5843043 - Wed Mar 03 2010 12:18 PM

Type F .... holds up BESTER to heat !

--------------------
no, No, NO - not a vaca with the nUtTy FrUiTcAkE oleHAM - - he is so nutty if he ate a can of Planters cashews - he could be charged with CANNIBALISM ....


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Lefty
Quackster


Reged: Sep 05 2005
Loc: Santa Cruz, California
Re: 727 fluid- What to use? [Re: MisterFiberglass]
      #5843087 - Wed Mar 03 2010 12:49 PM

TCI Maxshift RTF works very well in 727s

http://www.tciauto.com/Products/Components/transmission_fluid.asp

and it's cheap.

http://www.summitracing.com/parts/TCI-950601/



--------------------

Learn the rules so you know how to break them properly - Dalai Lama


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stumpy



Reged: Jan 19 2003
Loc: Grand Prairie Texas
Re: 727 fluid- What to use? [Re: Lefty]
      #5843118 - Wed Mar 03 2010 01:13 PM

That ain't cheap compared to type F.

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CompSyn
super stock


Reged: Apr 24 2008
Loc: Pacific NW USA
Re: 727 fluid- What to use? [Re: stumpy]
      #5843332 - Wed Mar 03 2010 03:02 PM

Just know there could be possible drawbacks to using Ford Type F in your Chrysler transmission.

Frank Adkins explains in his book, Chrysler Performance Upgrades, that although Type F will cause a Chrysler 727 to shift better, the life span of of the front clutch pack can be dramatically reduced.

Then again in Carl Munroe's book, Torqueflite A-727 Transmission Handbook, "the type of transmission fluid used seems to have a definite effect on clutch life".

Sounds like if you have an all out race car and are not concerned about frequent transmission rebuilds, Type F is the way to go. Otherwise, a good Dexron fluid for a street/strip/show car would be a better choice.



--------------------
"All oils perform the same duties, but some perform them better than others. What factors do you consider when choosing a motor oil?" - Mopar Muscle Magazine - LINK


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ireland383
super stock


Reged: Nov 14 2004
Loc: Suffolk,VA
Re: 727 fluid- What to use? [Re: CompSyn]
      #5843372 - Wed Mar 03 2010 03:31 PM

I've always had good results with Dexron III.

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John_Kunkel
I Live Here


Reged: Jan 20 2003
Loc: Rio Linda, CA
Re: 727 fluid- What to use? [Re: CompSyn]
      #5843557 - Wed Mar 03 2010 04:56 PM

Quote:

Frank Adkins explains in his book, Chrysler Performance Upgrades, that although Type F will cause a Chrysler 727 to shift better, the life span of of the front clutch pack can be dramatically reduced.




I would be reluctant to use the word "dramatically" but the simple fact is that type F has less lubricating properties than most other fluids. Consider that the Ford transmissions that type F was originally spec'ed for have clutch packs just like the TF and the friction material is similar if not the same and you don't see an epidemic of clutch failures in them.

Some (myself included) think that the lubrication to the front clutches in the 727 is marginal, a simple mod will take care of that.

--------------------
I'm supposed to respect my elders, but it’s getting harder and harder for me to find one now.


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MisterFiberglass



Reged: Jul 04 2008
Loc: WINNING - in PaRaDiSe ....Bra...
Re: 727 fluid- What to use? [Re: CompSyn]
      #5843711 - Wed Mar 03 2010 05:58 PM

Quote:

Just know there could be possible drawbacks to using Ford Type F in your Chrysler transmission.

Frank Adkins explains in his book, Chrysler Performance Upgrades, that although Type F will cause a Chrysler 727 to shift better, the life span of of the front clutch pack can be dramatically reduced.

Then again in Carl Munroe's book, Torqueflite A-727 Transmission Handbook, "the type of transmission fluid used seems to have a definite effect on clutch life".

Sounds like if you have an all out race car and are not concerned about frequent transmission rebuilds, Type F is the way to go. Otherwise, a good Dexron fluid for a street/strip/show car would be a better choice.






Hey C S ....

Please define FREQUENT REBUILDS ?

In my 62 .... is a trans that I built back in the middle 70's ... it has had maybe 5 diff motors in front of it and maybe has 40k miles on it. The SAME type F fluid in it since day one.

Manual VB, trick drum, cut-down hemi band .... NO trash in the pan EVER.

Do you BELIEVE everything that you read ?

--------------------
no, No, NO - not a vaca with the nUtTy FrUiTcAkE oleHAM - - he is so nutty if he ate a can of Planters cashews - he could be charged with CANNIBALISM ....


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bonefish
master


Reged: Nov 03 2004
Loc: s.w.fl
Re: 727 fluid- What to use? [Re: MisterFiberglass]
      #5844155 - Wed Mar 03 2010 09:26 PM

in my 11.00 sec b-body street car i just use what ever is on sale or the cheapest,mix and match,been shiftin hard for 35,000 mi.but who knows mabey its gettin ready to prematurly fail.

--------------------
"when people fear the government there is tyrany,when the government fear the people there is liberty." THOMAS JEFFERSON

Edited by bonefish (Wed Mar 03 2010 09:28 PM)


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383man
493man


Reged: Jan 19 2003
Loc: Balt. Md
Re: 727 fluid- What to use? [Re: bonefish]
      #5844171 - Wed Mar 03 2010 09:33 PM

I have always used the Mopar fluid and I use ATF+4 now. But I have worked for Mopar dealers for the last 24 years so I get the Mopar fluid at a real good price. My brother use ATF in all his race cars also and we have never had any tranny problems. Ron

--------------------
My car...63 Sport Fury Max Wedge wanna be street car..with new 493 pump gas full exh eng.......10.76 @ 124.49 ! ! ! My page on the cool 62-65 Mopar site ! http://www.1962to1965mopar.ornocar.com/mmo82008.html


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dave571
master


Reged: Dec 02 2003
Loc: Carstairs, Alberta, Canada
Re: 727 fluid- What to use? [Re: 383man]
      #5844264 - Wed Mar 03 2010 10:51 PM

If it's a driver, I can't see why you'd want type F. The best in 50's technology can probably be improved on.

Even ford guys stopped using it in 79.

In the same breath, the 727 isn't cutting edge either, so it is pretty forgiving with whatever fluid you want.

For me, I know modern transmissions put MUCH bigger demands on the fluid, as far as heat etc.. That said, modern fluids have to take up the slack.

Much Like 383 man, I work at a dealership (fordstore for me though) and get the fluid for a pretty good deal. I use mercon 3/dexron 3 curently, but we don't sell it anymore. Replaced with mercon 5, so that's what'll be in the car this year.

If money is a factor, a 20 litre/5 gallon pail of dexron 3 is pretty cheap at walmart.

--------------------
www.davesmopar.com

11.85 @ 114,3890 pnds, all iron, hyd cam, 750 carb, 440, 3.73 gear
Im a musician too www.davesmopar.com/davesmusic.htm


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charge70
enthusiast


Reged: Aug 04 2007
Loc: Mass
Re: 727 fluid- What to use? [Re: dave571]
      #5844486 - Thu Mar 04 2010 06:24 AM

John K. from the board told me to use a 50/50 mix of Dex/Merc and type F,which is now FA.John.

--------------------
1970 Dodge Charger R/T S.E.
1969 Dodge Dart GTS 440 M-Code
1970 Dodge Charger 500 383/4-speed w/A.C.


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CompSyn
super stock


Reged: Apr 24 2008
Loc: Pacific NW USA
Re: 727 fluid- What to use? [Re: MisterFiberglass]
      #5844491 - Thu Mar 04 2010 06:33 AM

Quote:

Quote:

Just know there could be possible drawbacks to using Ford Type F in your Chrysler transmission.

Frank Adkins explains in his book, Chrysler Performance Upgrades, that although Type F will cause a Chrysler 727 to shift better, the life span of of the front clutch pack can be dramatically reduced.

Then again in Carl Munroe's book, Torqueflite A-727 Transmission Handbook, "the type of transmission fluid used seems to have a definite effect on clutch life".

Sounds like if you have an all out race car and are not concerned about frequent transmission rebuilds, Type F is the way to go. Otherwise, a good Dexron fluid for a street/strip/show car would be a better choice.






Hey C S ....

Please define FREQUENT REBUILDS ?

In my 62 .... is a trans that I built back in the middle 70's ... it has had maybe 5 diff motors in front of it and maybe has 40k miles on it. The SAME type F fluid in it since day one.

Manual VB, trick drum, cut-down hemi band .... NO trash in the pan EVER.

Do you BELIEVE everything that you read ?




Doc, I'm sure glad you're around. Civilized debate is always oh so splendid. Great to see you.

The OP wants to know about automatic transmission fluid options. I informed him of the ideas and opinions of a couple authors, Frank Adkins and Carl H. Munroe, two individuals who are accomplished mechanics and who have been involved in the automotive hobby for decades. Between their statements, it becomes at least somewhat apparent that it's important to select the right ATF for the right application. Don't you think the OP should at least know the possible pros and cons to using any given type of ATF so that he can make an informed discussion of his own?

You provided him information that his transmission may be reliable up to 40,000-miles with Type F and that you feel, “Type F .... holds up BESTER to heat”.

That’s great, maybe he has some directions he can go in now?

I submit to you that since we are not living in the 60s anymore and have had some technological advancements in lubrication technology since then, there very well could be better options than Type F.

Since we know that high performance automatic transmissions can generate lots of heat very quickly and that conventional petroleum products break down and are not very shear stable in high heat extremes, a modern Dexron/Mercon Synthetic ATF may be an attractive option.

And perhaps that by properly building and programming the transmissions shift points, it won’t be necessary to mix and mismatch ATF types to achieve the desired shift performance?

--------------------
"All oils perform the same duties, but some perform them better than others. What factors do you consider when choosing a motor oil?" - Mopar Muscle Magazine - LINK


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Mattax
mopar


Reged: Feb 28 2010
Loc: Phila. Pa.
Re: 727 fluid- What to use? [Re: Pat_Whalen]
      #5844529 - Thu Mar 04 2010 06:59 AM

Type F is about the last of the unmodified AFTs.
All of the Dex/Merc and related ATFs are friction modified. The modified ATF's change the way the clutches and bands grab and hold. All things being equal, the clutches and bands will grab quicker and harder with an unmodified ATF than a modified ATF. (They also may effect the release)

Things have become far more complicated in recent years due to the computers for the automatics.
Dexron II or III is hard to find. Here's a repost from another list of my conclusions in 2008 as to
what commonly available fluid to put in a torqueflite 727 or 9xx.

Type F. It's in a category of its own.
The only unmodified atf with a dynamic coefficient that
increases as clutches and bands lock up - resulting in firmer shifts.
If that's what you need, great. Drawback is that the fluid doesn't hold
up as long.

Of the modified ATFs, the options in order of preference:
1. Dexron VI. This is GM's current standard. By definition, Dex VI is
fully synthetic and has the lowest low temperature viscosity. That's
great for street and the first autocross run of the day. However, what
convinced me that this is probably the best current replacement (unless
Type F is wanted) was that several manufacturers specifically list
it as backward compatible to Dex III *and* Dex II.

2. Synthetics. Several manufacturers offer synthetics labled as
appropriate for Dex III applications. e.g. Mobile 1 Synthetic, Castrol
Syntec, Valvoline Synpower. But it seemed that if the manufacturer offered a Dex VI,
they stated Dex VI is the prefered replacement. (Valvoline, Mobile)

3a Dexron/Mercon. These are probably all fine - especially if the trans
has some leaks - since its generally cheaper than options 1 & 2. A lot of
people who post on the web and seem to be knowledgeable like to point out that
Dexron III and earlier 'no longer exist'. What they mean is that
GM is no longer licensing the early versions, therefore what is being sold may
or may not meet the former Dex III standards. My feeling is that may be
technically true, but the companies have other incentives to make sure
these products are what they say they are.

3b Dexron/Mercon - a chronology. Gleanings from the web (which appear to be
more substantial than wild rumors, but you've been warned).
Dexron II 1973 - 1987
Dexron IIe was for electronic controls & had extra cleaning agents.
Mercon 1992- Contained less wax than Dexron
Dexron III c.1993 - Similar to Mercon. Lower low temperature
viscosity than earlier versions. Said to have better oxidation
resistance and improved seal life. Not all agree on the compatibility.

4. ATF+3, ATF+4. Similar to Dexron but formulated specifically for
Chrysler transmission control modules. All of the manufacturer spec
sheets I found on-line seemed to agree - NOT recommended for DEX 3
applications.

5. Mercon V. Seems to be the Ford version of Chrysler's ATF+. Also not
fully backward compatible.

6. Multi purpose: Probably the same as Dex/Merc, but better check the
manufacturers recommendations. Seems like too much of crapshoot for
people who care about how the autogear changer shifts.


These were my conclusions and obviously others may come to different conclusions. I've used Dex II and III, Type F, ATF+, Dex VI at one time or another in my own 727s. The only one that I was really unhappy with how it seemed to effect the shifting were the ATF+3/+4. I'm currently using Dex VI in the leak free trans and Dex/Merc in the Jeep with rear leak.
--
Matt
67 Barracuda nb 340 TF727
85 Grand? Wagoneer AMC 360 TF727 np229


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John_Kunkel
I Live Here


Reged: Jan 20 2003
Loc: Rio Linda, CA
Re: 727 fluid- What to use? [Re: CompSyn]
      #5845582 - Thu Mar 04 2010 04:39 PM

Quote:



I submit to you that since we are not living in the 60s anymore and have had some technological advancements in lubrication technology since then, there very well could be better options than Type F.




Keep in mind that the new generation of fluids are formulated for a new generation of transmissions that, for the most part, have lockup (or partial lockup) converters and overdrive which has the planetary gears running most of the time.

OTOH, the performance 727 rarely used a lockup converter nor does it have the planetaries running the majority of the time.

--------------------
I'm supposed to respect my elders, but it’s getting harder and harder for me to find one now.


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CompSyn
super stock


Reged: Apr 24 2008
Loc: Pacific NW USA
Re: 727 fluid- What to use? [Re: John_Kunkel]
      #5846451 - Fri Mar 05 2010 04:24 AM

Quote:

Quote:



I submit to you that since we are not living in the 60s anymore and have had some technological advancements in lubrication technology since then, there very well could be better options than Type F.




Keep in mind that the new generation of fluids are formulated for a new generation of transmissions that, for the most part, have lockup (or partial lockup) converters and overdrive which has the planetary gears running most of the time.

OTOH, the performance 727 rarely used a lockup converter nor does it have the planetaries running the majority of the time.




Right, to clarify, I'm not referring to the newest of the new DEXRON® VI, MERCON® LV, SP low viscosity ATFs; don't run those in your 727.

What I am referring to is DEXRON® I, II, III compatible synthetic ATF.

--------------------
"All oils perform the same duties, but some perform them better than others. What factors do you consider when choosing a motor oil?" - Mopar Muscle Magazine - LINK


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jef408
member


Reged: Dec 05 2008
Loc: Indiana
Re: 727 fluid- What to use? [Re: Pat_Whalen]
      #5846457 - Fri Mar 05 2010 04:36 AM

type f/type f/type f!!!!!!!!

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TB3CUDA
mopar


Reged: Sep 13 2003
Re: 727 fluid- What to use? [Re: jef408]
      #5846468 - Fri Mar 05 2010 05:05 AM

if type f is the way to go,what maufacturer?valvaline,castrol??or just any type f,also is for race or street use,or both

Edited by TB3CUDA (Fri Mar 05 2010 05:16 AM)


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moparzrule
makes him awesome - not


Reged: Dec 10 2009
Loc: PA
Re: 727 fluid- What to use? [Re: TB3CUDA]
      #5846574 - Fri Mar 05 2010 06:51 AM

Allison TRANSYND fluid.

http://www.allisontransmission.com/service/transynd.jsp

--------------------
My
Own
Personal
Adrenaline
Rush


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Mattax
mopar


Reged: Feb 28 2010
Loc: Phila. Pa.
Re: 727 fluid- What to use? [Re: CompSyn]
      #5846598 - Fri Mar 05 2010 07:20 AM

Quote:


Right, to clarify, I'm not referring to the newest of the new DEXRON® VI, MERCON® LV, SP low viscosity ATFs; don't run those in your 727.





WRT the Dex VI we'll have to agree to disagree on that one. Your competitors who make Dex VI specifically state it is backward compatible to Dex II and Dex III.

As far as I can tell, the differences in the ATF's friction modifiers are going to effect the way the clutch packs and bands grab. We're talking about what is happening for that brief moment while the clutch is slipping. That timing is critical in an automatic. However, as someone pointed out, it s hardly the only factor. Anyone who has modified their 727 ought to use the fluid characteristics their clutch supplier and/or builder recommends. Anyway, its the friction modifiers that result in Dex VI working fine for a plain ole 727 and ATF+ not working so well.

One advantage the Dex III had over II, and all the newer ATFs have over Dex III is the lower, low viscosity. An analogy to motor oil is that its like having a 10w-40 synthetic instead of a 20w-40 conventional oil. It means that even below operating temperature, the ATF acts more closely to the characterists it has when at operating temperature. For some applications, that's almost irrelevent, others its very important. For short drives and autocross, its important. If you're pulling to the line and loading the torque coverter, the fluid will be at operating temp real quick if it wasn't already.


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jef408
member


Reged: Dec 05 2008
Loc: Indiana
Re: 727 fluid- What to use? [Re: TB3CUDA]
      #5846619 - Fri Mar 05 2010 07:34 AM

there is better fluids out there but they are more expensive,theres absolutely nothing wrong with type f.the brand dont matter,its which ever you choose or prefer,ive ran it for years and no problems,especially if you run a stall converter,you would want to change the fluid fairly often anyways.some people claim that it breaks down and ruins the trans!maybe if you only change the fluid every 50,ooo,who does that?

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stumpy



Reged: Jan 19 2003
Loc: Grand Prairie Texas
Re: 727 fluid- What to use? [Re: jef408]
      #5846857 - Fri Mar 05 2010 09:58 AM

Another vote for type F. Used it for years with no problems.

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scratchnfotraction
gotta want it


Reged: May 29 2003
Loc: Florida
Re: 727 fluid- What to use? [Re: stumpy]
      #5847065 - Fri Mar 05 2010 12:26 PM

heres a ? I read on here that hydrolic fluid is even used and mixed with the tranz fluid

whats the opinion on that?

yea or nay..? can it be done safely?I just use the house brand dex/mec or F when I find it

does it matter on the mixing of the 2?

like said you cant get it all out,I just button mine back up with a manual VB..checked and no TC drain plug






--------------------
L


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Dougsmopars
top fuel


Reged: May 03 2005
Loc: dark side of the moon
Re: 727 fluid- What to use? [Re: scratchnfotraction]
      #5847261 - Fri Mar 05 2010 02:47 PM

Type F. Allways used it never had a problem. Local tranny guy here has been building high performence Mopar auto's for over 35 years. Allways recomended Type F. If it ain't broke don't fix it. I'll stick with what has allways worked for me. Type F

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CompSyn
super stock


Reged: Apr 24 2008
Loc: Pacific NW USA
Re: 727 fluid- What to use? [Re: Mattax]
      #5848321 - Sat Mar 06 2010 06:28 AM

Quote:

Quote:


Right, to clarify, I'm not referring to the newest of the new DEXRON® VI, MERCON® LV, SP low viscosity ATFs; don't run those in your 727.





WRT the Dex VI we'll have to agree to disagree on that one. Your competitors who make Dex VI specifically state it is backward compatible to Dex II and Dex III.

As far as I can tell, the differences in the ATF's friction modifiers are going to effect the way the clutch packs and bands grab. We're talking about what is happening for that brief moment while the clutch is slipping. That timing is critical in an automatic. However, as someone pointed out, it s hardly the only factor. Anyone who has modified their 727 ought to use the fluid characteristics their clutch supplier and/or builder recommends. Anyway, its the friction modifiers that result in Dex VI working fine for a plain ole 727 and ATF+ not working so well.

One advantage the Dex III had over II, and all the newer ATFs have over Dex III is the lower, low viscosity. An analogy to motor oil is that its like having a 10w-40 synthetic instead of a 20w-40 conventional oil. It means that even below operating temperature, the ATF acts more closely to the characterists it has when at operating temperature. For some applications, that's almost irrelevent, others its very important. For short drives and autocross, its important. If you're pulling to the line and loading the torque coverter, the fluid will be at operating temp real quick if it wasn't already.




It's true, they tell us the latest Dex VI variant is backwards compatible with the Dex's before it. Let's hope their right, remember when they told us that API (SM) rated motor oils were backwards compatible with all other previous API rated oils? Many would disagree with that one today.

One thing is sure, there are some differences in viscosity, for example:

Synthetic Type F: 7.1 @ 212F

Synthetic Dex III: 7.6 @ 212F

Synthetic Dex VI: 6.0 @ 212F

Viscosity of the same ATFs cooled down to 104F

Synthetic Type F: 41.3 @ 104F

Synthetic Dex III: 38.9 @ 104F

Synthetic Dex VI: 29.8 @ 104F

Viscosity of the same ATFs cooled down to 32F (freezing)

Synthetic Type F: 205.3 @ 32F

Synthetic Dex III: 172.1 @ 32F

Synthetic Dex VI: 128.3 @ 32F

--------------------
"All oils perform the same duties, but some perform them better than others. What factors do you consider when choosing a motor oil?" - Mopar Muscle Magazine - LINK


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