Author Topic: Synthetics  (Read 4801 times)

Offline bheinz57

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Synthetics
« on: January 17, 2004, 10:46:02 AM »
I know Subaru vehicles are picky when it comes to trannys, gears.  Anyone have good, lasting luck with synthetic gear oils for any late model Subaru?  I have read most of the gear oil tech and it seems to go just about any way depending on who tells the story.  And, does it really matter?  Subaru OEM is just fine I'm sure.  10-Q.  Brian

Offline bheinz57

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Synthetics
« Reply #1 on: January 23, 2004, 01:07:52 PM »
Anyone out there have any suggestions?

Offline omahasubaru

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Synthetics
« Reply #2 on: January 23, 2004, 07:38:07 PM »
Shoot Brett an e-mail. He can tell you his experience with synthetic gear oil in his WRX.

Offline omaha2.5rs

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« Reply #3 on: January 29, 2004, 11:31:38 PM »
I have had Motul Gear 300 in my gearbox since 13,300 miles.  I currently have 40,074 miles and have had no problems.  I will use it again for my next change...........................Doug
2001 2.5RS Sedan BRP 5mt #22 STS

Offline bheinz57

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« Reply #4 on: October 25, 2004, 11:57:16 AM »
Bring this puppy back from the dead...Okay, it's time to change out my manual tranny and rear diff fluid.  I have talked to some of you with your personal results.  I don't need anything heavy duty, but I do want synthetic.  Amsoil has given a few of you good luck, and Doug said Motul 300 has given him good luck.  

Regarding what brand you have and where, can some of you testify to your thoughts on your specific setup?  I know this has been beaten to death somewhat, but I'm curious now how things have held up with more miles on the specific fluids.

Maybe let me know what kind of fluid, where it is, and how many miles since changeout, initial impressions, and impressions now.  And finally, would you do it all over again.  Manual trannies and rear diff's only please.

Thank you kindly.  Brian

Offline JCampbell

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Synthetics
« Reply #5 on: October 25, 2004, 03:50:46 PM »
I put in B&M StickShift in the tranny and diff. It's a synthetic 75w90 GL-5. At first I didn't like it, it's too slippery so it's easy to grind a shift. I'm not sure what I do differently now but haven't ground a gear in a long time.
Love the stuff now, especially in the winter when it's sub-zero.

Next change I'll just put in non-synthetic, it's cheaper and probably works just as well.... or maybe I'll go with Redline's shockproof, hmmm.
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Offline wrxmax

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« Reply #6 on: October 25, 2004, 04:27:47 PM »
I have an 04 WRX 5-speed.  And installed:

RedLine 75W90NS Synthetic in the transmission
RedLine 75W90 Synthetic in the rear differential

The difference is that the NS does not contain friction reducers (needed for the rear diff posi unit but non-desirable for the trans synchronizers).  I will occasional grind (more like a pop) into first gear.  Other than that I am very happy.  Synthetic fluids will always run cooler and provide much better lubrication.

If you decide to go with conventional or synthetic make sure you change it sooner than the factory recommendations.  Both my trans and diff were extremely nasty (tons of metal shavings) at ~5,000 miles.

http://www.redlineoil.com/
« Last Edit: October 25, 2004, 04:43:09 PM by wrxmax »
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Offline omaha2.5rs

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« Reply #7 on: October 26, 2004, 03:16:32 AM »
I now have almost 50000 miles on the car and I will be changing out the Motul Gear 300 sometime soon.  Once the TWE header goes on I won't be able to get to the trans drain valve very easily. I got the Motul from a motorcycle shop (DNS).     I do have RedLine 75W90 Synthetic in the rear differential.
Doug
2001 2.5RS Sedan BRP 5mt #22 STS

Offline bheinz57

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« Reply #8 on: October 26, 2004, 08:24:55 AM »
Thanks, Doug.  I may, may be going to try and do the Motul 300 for the tranny and maybe just Mobil 1 for the rear.  How hard is it to get the Motul?  Can it be found locally?   Brian

Offline bheinz57

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Synthetics
« Reply #9 on: October 27, 2004, 10:58:14 PM »
Well, I bought some Motul Gear 300.  I'm going to do the tranny and the rear diff.  Maybe this coming Friday if I get a chance.  Thanks for the input.  Brian

Offline omaha2.5rs

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« Reply #10 on: October 28, 2004, 10:41:45 AM »
If you don't mind me asking, where did you get the Motul (because I am going to need some soon) and how much was it?
Thanks
Doug
 
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Offline bheinz57

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« Reply #11 on: October 28, 2004, 11:05:22 PM »
I took their last 6 liters at PSP (Power Sports Pro) on 112th and Maple.  I had to call around and they were one of the only ones that even carried Motul let alone the Gear 300.  I told them I would take the last bottle if I got 15% off the total and they did.  With discount and tax, it was $82 for six bottles and four NGK plugs @ 2.99 a piece.
   Good luck finding some more in a short time.  Call the motorcycle shops.   Brian

Offline bheinz57

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Synthetics
« Reply #12 on: October 29, 2004, 01:51:21 PM »
Well, my day off today has been productive.  I have new spark plugs, new engine oil, new tranny oil, new rear diff oil, new front brake pads.

The Motul Gear 300 is nice.  Everything went easy.

Have a nice day.  Brian

Offline Bounty Hunter

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Synthetics
« Reply #13 on: November 02, 2004, 04:38:09 PM »
Well I'm looking into synthetic fluids as the STi will need an oil change soon!  I've always used Mobil 1 full synth but I'm looking into the others.  What do you use and how much does it cost you?  Where do you get it?

 
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Offline bheinz57

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« Reply #14 on: November 03, 2004, 12:36:27 AM »
I used Motul Gear 300 full synthetic in the tranny and rear diff.  Kinda hard to get locally, I think I may have bought the last six liters.  Motorcycle shops sell it here in the US, but the internet is a great way to get it too.  I think around $11 a liter is what it came out to be.  Now with about 100 miles on it and 36 degrees tonight after work, I really like this stuff.    Brian

Offline bheinz57

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Re: Synthetics
« Reply #15 on: March 04, 2012, 05:11:55 PM »
Back from the dead!

Just changed fluids again, tranny and rear diff...

Same stuff - Motul Gear 300

Excellent results.

So here it is...First changed in October of 2004 with 28k or so.
Used Motul Gear 300 in tranny and rear diff.

Changed again today.  Tranny fluid looked excellent.  Same with diff fluid.  A darker amber, but overall excellent.

Over 7 years and 79k on the ticker now.  Sure, not a lot of miles, but 50k on the fluid.

I still highly recommend this fluid.  Of course, now a days, you're looking @ ~$20 a Liter!

FYI peeps.

Brian

Offline corx

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Re: Synthetics
« Reply #16 on: March 04, 2012, 10:02:42 PM »
75w90. that is all.

i plan on the royal purple myself... but any is good really.
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Offline Chris C

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Re: Synthetics
« Reply #17 on: March 05, 2012, 05:04:36 PM »
75w90. that is all.

i plan on the royal purple myself... but any is good really.

I always ran Motul in the WRX and would in the Vette but the required fluid is WAY more expensive.  Tried Royal Purple in the Vette for 2 years.  In less than 5k miles with one track day where the fluids were never overheated the tranny fluid broke down and I experienced very notchy shifting till the fluid was warm.  In talking with Tom from C&S he's seen the same thing happen with other cars running Royal Purple fluids.  I've switched to Amsoil since then. 

Offline kevinmfb

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Re: Synthetics
« Reply #18 on: March 08, 2012, 01:20:49 PM »
Royal Purple can suck my wang chung.
I have that in my car and am experiencing issues with my front diff/trans :(


Offline Chris C

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Re: Synthetics
« Reply #19 on: March 08, 2012, 05:16:58 PM »
Royal Purple can suck my wang chung.
I have that in my car and am experiencing issues with my front diff/trans :(

Hit Chris up in KC for some Amsoil.  Either he or his Dad are up here about every 3 weeks. 

Offline kevinmfb

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Re: Synthetics
« Reply #20 on: March 08, 2012, 07:51:36 PM »
Good call. I'll shoot him an email.

Offline scby_snk

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Re: Synthetics
« Reply #21 on: March 08, 2012, 10:38:48 PM »
Royal Purple can suck my wang chung.
I have that in my car and am experiencing issues with my front diff/trans :(

I ran RP in a car for awhile and I drained it asap and went to Red Line...I am thinking Motul and light shockproof for my poor little 5 speed ;)
WRX Limited on e85 and a loud transmission


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Offline WheelGap

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Re: Synthetics
« Reply #22 on: March 09, 2012, 08:20:41 AM »
Royal Purple can suck my wang chung.
I have that in my car and am experiencing issues with my front diff/trans :(

I ran RP in a car for awhile and I drained it asap and went to Red Line...I am thinking Motul and light shockproof for my poor little 5 speed ;)

No no no no on shockproof.

There's some sort of additive in shockproof that gets centrifuged out and it's waxy and collects in the bearing races starving them of lubrication.  I've heard this from at least 3 shops that rebuild a lot of transmissions.  One of them calls it "shockpoof".

Edit:  Here's Peter VanBogart from Cascade Autosport who maintains quite a few gearboxes for rally teams:

yes, like beat egg whites! Plus they have blended in parafin wax(the shock "proof", under prolonged centrifical force it become separated and starts to gather in needle brg cages, packes them solid and acts as a squeegee. It also clogs the syncro grooves so they float on the cone, **** is useless.
« Last Edit: March 09, 2012, 08:25:59 AM by WheelGap »
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Offline jaz

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Re: Synthetics
« Reply #23 on: March 09, 2012, 08:48:02 AM »
There are 3 different grades of Shock Proof where one is safe for your normal synchro transmission.  Shock Proof is something I have researched extensively as I'm currently making more power than my transmission is supposed to withstand in my SHO.  A very trusted buddy and former Ford Engineer (on my particular model of car too) recommended me a mixture of SP that I'll be using this year (2 parts lightweight/ 1 part super lightweight)

What Mike is looking to use is a mixture of lightweight (or super lightweight) SP and Motul.  A mixture like that will not separate and clog as you mention.

Now for the STi...  No grade of Shock Proof should be used.

Offline scby_snk

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Re: Synthetics
« Reply #24 on: March 09, 2012, 08:51:51 AM »
There are 3 different grades of Shock Proof where one is safe for your normal synchro transmission.  Shock Proof is something I have researched extensively as I'm currently making more power than my transmission is supposed to withstand in my SHO.  A very trusted buddy and former Ford Engineer (on my particular model of car too) recommended me a mixture of SP that I'll be using this year (2 parts lightweight/ 1 part super lightweight)

What Mike is looking to use is a mixture of lightweight (or super lightweight) SP and Motul.  A mixture like that will not separate and clog as you mention.

Now for the STi...  No grade of Shock Proof should be used.


^ what he said
WRX Limited on e85 and a loud transmission


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