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View Poll Results: What do Midwest Folks Use for Transmission Fluid?
Scotty's Cocktail (Redline Shockproof, Sychromesh, 75w90 dino) 27 39.71%
100% Redline Shockproof 13 19.12%
Redline Shockproof & 75w90 Dino Oil (Any ratio) 3 4.41%
Pennzoil Synchromesh & 75w90 Dino Oil (Any ratio) 4 5.88%
100% Dino Oil 75w90 5 7.35%
100% Synthetic 75w90 16 23.53%
Voters: 68. You may not vote on this poll

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Old 10-21-2007, 09:16 PM   #1
proletariandan
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Default What do Midwest Folks Use for Transmission Fluid?

Wanting to see what the Midwest guys think about this as I'll be driving my wagon in the winter just hopefully not in the snow. The car will get tracked a few times during the year so I need something that will stand up to the abuse. Dylan (who just rebuilt it) recommended that I change the fluid more frequently since I track it so it will probably get done at least once a year, which for me should be about 10k.

Thanks,
Dan
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Old 10-21-2007, 09:48 PM   #2
fliz
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I run Redline Lightweight Shockproof in the WRX and the rally car. WRX gets changed every 15K.
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Old 10-21-2007, 09:49 PM   #3
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Royal Purple, synthetic whatever 75w90 variety that is.
Pep Boys carries it.
1st gear shifts have improved slightly during cold season.
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Old 10-21-2007, 09:57 PM   #4
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Quote:
Originally Posted by f1anatic View Post
Royal Purple, synthetic whatever 75w90 variety that is.
Pep Boys carries it.
1st gear shifts have improved slightly during cold season.
Blah!

Don't even get me started on that ****.




Anyway, I use Subaru Extra S gear oil. Very expensive, but for the same price as the NEO I used to run I get 5x as much, so not so expensive in the long run.
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Old 10-21-2007, 10:05 PM   #5
triple_s1x
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Motul... Used it the last 2 seasons without any issues.
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Old 10-21-2007, 10:09 PM   #6
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Dino Valvoline. Not the best, but it seems to work just fine.
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Old 10-21-2007, 10:27 PM   #7
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Quote:
Originally Posted by nate49509 View Post
Dino Valvoline. Not the best, but it seems to work just fine.
Definitely the cheapest option
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Old 10-21-2007, 10:29 PM   #8
ujduche
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Quote:
Originally Posted by triple_s1x View Post
Motul... Used it the last 2 seasons without any issues.
+1 for Motul
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Old 10-21-2007, 10:35 PM   #9
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I would use uncle scotty's mix if you have gear grinding issues.
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Old 10-21-2007, 10:41 PM   #10
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We've tried a ton of fluids and cocktails. best one we have tried personally has been the motul. Subaru Extra S is on out list for what's next.
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Old 10-21-2007, 10:51 PM   #11
proletariandan
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Quote:
Originally Posted by Turn in Concepts View Post
We've tried a ton of fluids and cocktails. best one we have tried personally has been the motul. Subaru Extra S is on out list for what's next.
Can the Motul be had locally? Is the Extra S the stuff you have to buy by the drum?
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Old 10-21-2007, 10:58 PM   #12
cellobro
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the spinal fluid of mazda owners... sorry, that's all I got. go Bears
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Old 10-21-2007, 11:05 PM   #13
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Quote:
Originally Posted by hondaslayer View Post
Blah!

Don't even get me started on that ****.




Anyway, I use Subaru Extra S gear oil. Very expensive, but for the same price as the NEO I used to run I get 5x as much, so not so expensive in the long run.
I'm down if a bunch of local members want to pitch in to get some Extra-S

I'm sure we're all aware thats theres no substitute.
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Old 10-21-2007, 11:24 PM   #14
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I've used Redline 75w90, Royal Purple SyncroMax, and currently I'm running 50/50 mix of Shockproof lightweight and Redline MT90 in the WRX.

The Miata is running 30/70 mixture of Shockproof lightweight to Redline MT90.

Both are running well.

The Subaru now downsifts fairly easily into first. 40 degree weather isn't bothering it. I'm waiting for it to get colder though.

The Miata no longer suffers from hot tranny issues and some syncro issues seem to have resolved themselves. IE Grinding syncro go bye bye.

I don't recommend running Shockproof by itself. It sends to stick to the tranny walls and people have claimed that it tends to disappear and or turn into a thick goo. Even after the initial change you have to top it off after the first or second run after which the level in my car has stayed steady. I don't recommend Redline 75w90 or 75w90NS by itself, its too slick for the syncros. MT90 by itself was too light even for the Miata which began suffering hot tranny shifting issues.

Some people swear by Redline 75w90 and MT90 combo. I haven't tried that one yet.

I have driven a FXT with Uncle Scotty's cocktail in it. Wow, it shifts very smooth.

I had the Royal Purple SyncoMax in the RS and the Miata. Initially the stuff shifts great, but over a short time, whatever they are using for friction modifiers seems to disappear and you are left with a baulky shifter.

As for the Subaru Extra S.. If its the same stuff that comes in the tranny, I don't want it.

YMMV

Last edited by Revision; 10-21-2007 at 11:31 PM.
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Old 10-22-2007, 12:56 AM   #15
Tim Sanderson
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I use amsoil 5w30 synchromesh in my 5 speed. Before that I used amsoil series 2000 20w50 motor oil in it. 193,000 miles and still shifts fine.
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Old 10-22-2007, 12:01 PM   #16
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I did Scotty's Cocktail, but I used more Shockproof and less dino. I noticed ZERO difference from the OEM fluid. Going to see how much more or less expensive OEM fluid is and figure out what to purchase next time.
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Old 10-22-2007, 12:31 PM   #17
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Quote:
Originally Posted by Revision View Post
I had the Royal Purple SyncoMax in the RS and the Miata. Initially the stuff shifts great, but over a short time, whatever they are using for friction modifiers seems to disappear and you are left with a baulky shifter.

As for the Subaru Extra S.. If its the same stuff that comes in the tranny, I don't want it.

YMMV
Same results on the RP for me, except it left the synchros pitted and the bearings began to howl in short order as well (less than 3000 miles)

As for factory fill, not sure. It might be on the newer cars but again I am not sure. It does feel better than most standard 5 speeds, but feel is pretty subjective.
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Old 10-22-2007, 12:35 PM   #18
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I guess I should chime in here...

Scotty's cocktail
is just about the worst thing you can use in a Subaru manual transmission! The extremely high sulfur content destroys the Subaru uncoated baulk rings (part of the syncro). The excessive wear I have seen in the transmissions that people have doctored with this stuff in horrible. You cannot fix a mechanical issue with a fluid change! You are only masking the issue!

The OEM Subaru Extra S
This fluid is just standard gear oil with a friction modifier in it (like what old timers use in Detroit lockers). I sent a sample in to be analyzed by my oil guy. The results in viscosity breakdown are no better than a standard 75w90 dino oil.

Royal Purple- ugg what can I say about this stuff and be nice about it..hmm
It has an organic base stock on which it gives it very similar qualities to regular dino oil except a slightly better breakdown under heat aka a complete wast of money.

Redline oil- They do make the 75w90NS which is a low sulfur fluid that will not harm the baulk rings although we did see a lot more 3-4 grinds. Shockproof seems to work pretty well in the rear diff without any side effects. Please not that I rebuilt dwx's 6mt in December the shockproof literally had to be scooped out of his trans like pudding
I would not recommend it for anyone in cold climates.

Valvoline 75w90 Synthetic-
This is what I use in my customer's and my own car. It holds up extremely well in street and competition use. It also has an organic base stock like the Royal Purple but has a slightly better additive package like the Subaru Extra S. The best part about this particular fluid is how well it reacts to cold. Even with the coldest days here in Chicago I've never had it get sluggish.

As a side note to all who drive their cars more aggressive than "normal" or who make more power than stock:

Change your fluid every 10-15k miles!

Change your fluid after every track day, HPDE, Auto-X, Rally-X, etc!!

The better condition you keep your fluid in the longer it will be before you have to come see me or Ben for a rebuild!

Dylan @ DS1

This public service announcement has been brought to you by SOA who reminds you "Gears? Crunch all you want, we'll make more"

Last edited by downshift1; 10-22-2007 at 12:37 PM. Reason: typos
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Old 10-22-2007, 12:46 PM   #19
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Hey what would you recommend is the most protective for people in cold climates, im running shock proof right now, is the only side effect to running it in the winter is it goos up on the case walls or is it harmful to the gears?
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Old 10-22-2007, 01:14 PM   #20
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Quote:
Originally Posted by Scooby921 View Post
I did Scotty's Cocktail, but I used more Shockproof and less dino. I noticed ZERO difference from the OEM fluid. Going to see how much more or less expensive OEM fluid is and figure out what to purchase next time.
Brad,

I'll split the cost of a barrel of the Extra S with you. I've 43k on my trans now, so it might be time to do a flush. No offense to Ben, but I think it's something I can handle with the help of the locals.
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Old 10-22-2007, 01:27 PM   #21
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Quote:
Originally Posted by downshift1 View Post
Valvoline 75w90 Synthetic- This is what I use in my customer's and my own car. It holds up extremely well in street and competition use. It also has an organic base stock like the Royal Purple but has a slightly better additive package like the Subaru Extra S. The best part about this particular fluid is how well it reacts to cold. Even with the coldest days here in Chicago I've never had it get sluggish.
I figured you might have something to say about this Does anybody know where (if) this can be had locally?
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Old 10-22-2007, 01:41 PM   #22
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Quote:
Originally Posted by keithwrx8 View Post
Hey what would you recommend is the most protective for people in cold climates, im running shock proof right now, is the only side effect to running it in the winter is it goos up on the case walls or is it harmful to the gears?
I was ice racing in subzero temps last year, and even after parking outside overnight, I didn't have any issues with the trans. Although I almost had to jump the car (stupid stock battery).

This is on a stock (garage rebuilt) trans, bolts tires, and 250wtq.
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Old 10-22-2007, 01:56 PM   #23
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Stock fluid in my STi and Uncle Scotty's in my wagon.

Nick
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Old 10-22-2007, 02:04 PM   #24
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Keith- The Valvoline works very well in the cold. The issue with the shock proof is it has to be "warmed up" before really starts moving through the trans. This could cause excessive bearing wear.

The valvoline is available through NAPA and Carquest
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Old 10-22-2007, 02:14 PM   #25
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Dylan,

Out of curiosity, have you anything to say about N.E.O???


I loved it on my RS, but it was just too damned expensive to change every other oil change.
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