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Synchromesh: Valvoline Vs. Pennzoil #5143453 06/25/19 07:27 AM
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IndyFan Offline OP
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I'm changing the old Jeep's Synchromesh manual transmission fluid today. It is an NSG370 transmission.

Advance Auto has Pennzoil Synchromesh for 9 bucks a quart. O'Reilly has Valvoline for 10 bucks a quart.

What does the hive say about which might be better gear lube? The price is close enough not to be a factor. Are they essentially the same? I'm guessing Pennzoil was probably the original Jeep factory fill, at least in more recent years, due to FCA's close relationship with SOPUS.

One other quick question...What is the recommended shelf life of Synchromesh? I may have a bottle of Pennzoil stashed somewhere that's probably 5 years old. (If I do, and the shelf life is ok, that will decide it in favor of Pennzoil.)


18 Jeep JLUR Wrangler 3.6 22k
15 Ford Transit 125k, Reman 3.5 @85k
17 Jeep Renegade 2.4 21k
08 Jeep Wrangler 3.8 134k
04 Jeep Grand Cherokee 4.7 105k
99 Mercedes E430 Sport 92k
Re: Synchromesh: Valvoline Vs. Pennzoil [Re: IndyFan] #5143462 06/25/19 07:40 AM
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The pz one makes my jeep shift notchy. I have the valvoline fluid in it now and its fine. I prefer the Royal purple fluid over both of those though. Last time I changed it napa had the valvoline on clearance for $3/qt and since I'm cheap thats why I got it.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: Synchromesh: Valvoline Vs. Pennzoil [Re: IndyFan] #5143505 06/25/19 08:34 AM
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Any of these dedicated MTL's should work:

NOTE: This list is only a “suggested” list of MTFs. It is not an endorsement of any one fluid, nor is it implied that any one fluid will cure problems in MTs that have design problems or those that have excessive wear.


Mopar Type MS-9417 MTL 9.0 cSt
Valvoline MTF Part Number 811095 9.2 cSt
Pennzoil Synchromesh 9.3 cSt
RAVENOL PSA 9.5 cSt
RAVENOL SSG 9.5 cSt
Redline MTL 75W80
Amsoil MTF (9.7 cSt)
GM Synchromesh’s

Volvo MTF 645
Fuchs TITAN SINTOFLUID SAE 75W-80 synthetic MTF
Lodexol (Morris Lubricants) MTF
Motylgear 75W-80

Shelf Life is about 10 years for MTL oils. Suggest you warm it up and shake it well before installation if it has been on the shelf for 2 years or more.

Last edited by MolaKule; 06/25/19 08:36 AM.

"You ... sadist," said Mr Cummings, "you try to make people think." Ezra Pound (1885-1972)
Re: Synchromesh: Valvoline Vs. Pennzoil [Re: IndyFan] #5143785 06/25/19 02:00 PM
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If they both meed the required spec, I would default to Valvoline simply due to personal preference.
Currently I run Amsoil synchromesh in my ZF S6-40 with excellent results.


1995 Corvette coupe LT1 6-speed
2006 Tacoma 2.7 Base SR5 AC
1999 Yamaha YZ400FL
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Re: Synchromesh: Valvoline Vs. Pennzoil [Re: IndyFan] #5143929 06/25/19 04:56 PM
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I may try Valvoline. I ran Pennzoil awhile back and felt the Mopar was smoother and quieter. It is just too expensive. If I pay more, I'd be inclined towards Amsoil. I can't buy Amsoil off the shelf, though, and I want to change it tonight or tomorrow.

Any more experience out there with RP?


18 Jeep JLUR Wrangler 3.6 22k
15 Ford Transit 125k, Reman 3.5 @85k
17 Jeep Renegade 2.4 21k
08 Jeep Wrangler 3.8 134k
04 Jeep Grand Cherokee 4.7 105k
99 Mercedes E430 Sport 92k
Re: Synchromesh: Valvoline Vs. Pennzoil [Re: IndyFan] #5143983 06/25/19 06:06 PM
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MolaKule Offline
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Originally Posted by IndyFan


...Any more experience out there with RP?...


RP what?


"You ... sadist," said Mr Cummings, "you try to make people think." Ezra Pound (1885-1972)
Re: Synchromesh: Valvoline Vs. Pennzoil [Re: MolaKule] #5143996 06/25/19 06:14 PM
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Royal purple.


05 Chevy Impala
3.4 V6
Pit crew QS 10/30
Re: Synchromesh: Valvoline Vs. Pennzoil [Re: Red91] #5144012 06/25/19 06:48 PM
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MolaKule Offline
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Originally Posted by Red91
Royal purple.



Royal Purple does NOT have an MTF dedicated lubricant in the 10 cSt range, if that is what you're referring to.

They have only the Synchromax which has the viscosity of Dex/Merc ATF (7.5 cSt).

Last edited by MolaKule; 06/25/19 06:52 PM.

"You ... sadist," said Mr Cummings, "you try to make people think." Ezra Pound (1885-1972)
Re: Synchromesh: Valvoline Vs. Pennzoil [Re: MolaKule] #5144127 06/25/19 09:51 PM
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Originally Posted by MolaKule
Originally Posted by Red91
Royal purple.



Royal Purple does NOT have an MTF dedicated lubricant in the 10 cSt range, if that is what you're referring to.

They have only the Synchromax which has the viscosity of Dex/Merc ATF (7.5 cSt).


Ok, thanks. I'm going to pick up a couple quarts of Valvoline at Napa or O'Reilly and get it done.

Thanks for all the info, everyone!

Last edited by IndyFan; 06/25/19 09:51 PM.

18 Jeep JLUR Wrangler 3.6 22k
15 Ford Transit 125k, Reman 3.5 @85k
17 Jeep Renegade 2.4 21k
08 Jeep Wrangler 3.8 134k
04 Jeep Grand Cherokee 4.7 105k
99 Mercedes E430 Sport 92k
Re: Synchromesh: Valvoline Vs. Pennzoil [Re: MolaKule] #5144554 06/26/19 11:34 AM
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This information really needs to be in a "quick access reference sticky" somewhere....

Originally Posted by MolaKule

NOTE: This list is only a “suggested” list of MTFs. It is not an endorsement of any one fluid, nor is it implied that any one fluid will cure problems in MTs that have design problems or those that have excessive wear.

Mopar Type MS-9417 MTL 9.0 cSt
Valvoline MTF Part Number 811095 9.2 cSt
Pennzoil Synchromesh 9.3 cSt
RAVENOL PSA 9.5 cSt
RAVENOL SSG 9.5 cSt
Redline MTL 75W80
Amsoil MTF (9.7 cSt)
GM Synchromesh’s

Volvo MTF 645
Fuchs TITAN SINTOFLUID SAE 75W-80 synthetic MTF
Lodexol (Morris Lubricants) MTF
Motylgear 75W-80

Suggest you warm it up and shake it well before installation if it has been on the shelf for 2 years or more.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Synchromesh: Valvoline Vs. Pennzoil [Re: IndyFan] #5144805 06/26/19 03:19 PM
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MolaKule Offline
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An Updated article is posted here:

Manual Transmission Fluids


"You ... sadist," said Mr Cummings, "you try to make people think." Ezra Pound (1885-1972)
Re: Synchromesh: Valvoline Vs. Pennzoil [Re: MolaKule] #5144878 06/26/19 04:40 PM
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Originally Posted by MolaKule
An Updated article is posted here:

Manual Transmission Fluids


Wow, great stuff! Thanks for sharing. I went with Valvoline. Everything feels smooth. Thanks again for the help and the education to all here. This site is such an incredible resource because of your generosity!


18 Jeep JLUR Wrangler 3.6 22k
15 Ford Transit 125k, Reman 3.5 @85k
17 Jeep Renegade 2.4 21k
08 Jeep Wrangler 3.8 134k
04 Jeep Grand Cherokee 4.7 105k
99 Mercedes E430 Sport 92k
Re: Synchromesh: Valvoline Vs. Pennzoil [Re: IndyFan] #5144881 06/26/19 04:43 PM
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Sounds like they are well prepared for massive rebates and incentives. The guy or gal that spends 80 grand on it will thing he/she got a steal.

Last edited by IndyFan; 06/26/19 04:43 PM.

18 Jeep JLUR Wrangler 3.6 22k
15 Ford Transit 125k, Reman 3.5 @85k
17 Jeep Renegade 2.4 21k
08 Jeep Wrangler 3.8 134k
04 Jeep Grand Cherokee 4.7 105k
99 Mercedes E430 Sport 92k
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