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Old 03-28-2002, 11:29 AM   #1
tonytiger
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Question Mobil 1 for transmission fluid?

It's time to change the tranmission oil and even though I did searching for proper answer, some question left unanswered.

Firstly I do lots of city driving and do some hard shifting mainly upshifts. The fast downsifts are mostly from 3th or 4th to 2nd. I visited a local Subaru repair shop and they preferred Mobil 1.

Another thing they said about the transmission is the most common problem with Subies is the sychro. I don't know did he mean specially Subies as old as mine.

Where I live the brands like Amsoil and Redline are unknown and apparently the most known name is Mobil. So if I decide with your help to go synthetic it's Mobil 1.

My experience with the Subie's gearbox is very likely the same as many of you had according to the previous posts. It's hard to switch to the 1st when moving. Sometimes even 2nd causes some grunts at my face.

I bought the car used about two years ago and didn't grasp to ask about what trasmission it has in it. So it is most likely the Subarus own mineral oil or some synthetic.

My car is 5spd manual FWD and the users manual prefers Subarus own oil ( what a surprise). The Mobil's chart I looked preferred Mobil 1 SHC.

In finland the weather changes are quite big: In winter it can drop to -25 degrees Celsius and in summer it can be nearly +30 degrees Celsius.

I don't care much about fuel consumption.


So what should I use: Subaru's own oil, Mobil 1, Mobil 1 SHC or maybe something else?

Everything from hard knowledge to personal oppinions is highly appreciated.

Thanks in advance!


tony
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Old 03-28-2002, 11:57 AM   #2
zemmo
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Try the Mobil 1, and change it out if it doesn't work for you. It'll be a LOT better in cold weather. Some people have synchro problems with some synthetics, but I have not with any of the 4 I've used.
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Old 03-28-2002, 12:16 PM   #3
albie
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Post Mobil 1,?

Mobil one has a gear oil out, i have used it before, happy, W. some doubt. Redline oil has a synthetic gear oil for transmissions which i have read is much better on the synchros, check out the Redline Lightweght gear oil Thread.
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Old 03-28-2002, 01:27 PM   #4
tonytiger
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Thank you so far. I've read the Redline Lightweight thread before, but I haven't found a shop from my whereabouts that'd sell the brand.

What's the difference between Mobil 1 and Mobil 1 SHC? Which one is better for my purpose?


tony
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Old 03-28-2002, 02:04 PM   #5
albie
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Post Redline oils......

The subaru site has redline oils and the second address is a link page from a review site. If more info is needed just yell.
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Old 03-28-2002, 02:29 PM   #6
jhonas
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You can always mail order redline.

I ordered mine from www.summitracing.com, not sure if they'll ship to finland though... You could try redline's website to find other online retailers.

Getting the redline would probably cost you pretty penny, so I'd say give the mobil 1 gear oil a try. If it works for you without grinding/shifting problems then I'd say stick with that. If you get the gear grind on shifting, then I'd say look into getting the mobil 1 or using the subaru dino oil...
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Old 03-28-2002, 02:37 PM   #7
zemmo
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Old 03-28-2002, 02:59 PM   #8
bluesubie
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Definitely the Mobil SHC. It's not available in the U.S. in quart retail sizes (zemmo ). You could probably find info by searching the archives. The Subaru tuner RalliSpec, used to carry it because they could get it in the commercial 5 gallon container.

Dennis
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Old 03-28-2002, 02:59 PM   #9
tonytiger
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No I'm not ordering oil over Atlantic ocean

Zemmo: The SHC must mean something of the products property, since mobil has a transmission oil with the letters SHC on it.
Here

Quick lesson of Finnish:

1. vaihteisto means transmission
2. öljy means oil

Well however - it's a transmission oils on the given site


Keep the posts coming, I thank you.



tony
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Old 03-28-2002, 03:04 PM   #10
tonytiger
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You posted simultaneously bluesubie.
Do you know how the SHC differs from the regular and why rallispec used it?
We have it in nearly every store here, sounds good


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Old 03-28-2002, 03:33 PM   #11
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I usually get it backwards, so I don't want to say the wrong thing.
Mobil SHC is better for Subaru tranny's because of the friction modifier issue. One has them and one doesn't. Some people are more likely to get grinding with the M1, IIRC.
-Dennis

edit: I couldn't find it with an i-club search, but found it with a search on google.com.
From the STi Mailing List :

"The only difference between Mobil1 synthetic gear lube and Mobil SHC (also synthetic) is the lack of friction modifiers in Mobil SHC (preferred for Subaru tranny).

Mobil SHC from what I understand is an industrial product
and thus packaged for industry and not easily obtainable. We carry this fluid but get in 5-gal containers direct from the distributor...
...RalliSpec"

Last edited by bluesubie; 03-28-2002 at 04:02 PM.
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Old 03-28-2002, 05:07 PM   #12
tonytiger
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Have a Nice Day?

Thanks for the clarification bluesubie. The SHC doesn't the have the friction modifiers if I understood correctly.?

Please post more experiences and information related to this. I'm an information addict If you have used Mobil's transmission oil products, please tell what do you think about them.

I'll have to go to sleep since it's night here.

Have a nice Easter.


tony
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Old 03-28-2002, 10:50 PM   #13
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http://www.cobbtuning.com/tech/gearoil/index.html

Try this for an interesting article. I spoke with Cobb, and they're going to update. MT-90 gives the fastest synchro action, but is NOT GL-5 rated, so does not meet the lube specs for our Subaru trannies. They recommend Redline 75W90NS for 90% of Subie transmissions.
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Old 03-29-2002, 04:35 AM   #14
Frederf
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I think there's some spec in the oil so there's more friction so the synco's don't keep spinning like mad during shifts and cause grinding.
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Old 03-29-2002, 04:46 PM   #15
albie
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Default Re: Redline oils......

Quote:
Originally posted by albie
The subaru site has redline oils and the second address is a link page from a review site. If more info is needed just yell.
Albie
Sorry, was in a hurry,site #1: http://www.subaruparts.com/catalog/
Site #2 :http://www.subarureview.com/links.php
Hope this helps ya out.
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Old 03-29-2002, 11:26 PM   #16
snookem
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Oils ain't Oils

Mobilube 1 SHC which is NOT SOLD in north america is what you use for subaru gearboxes because not like most GL5 oils that have ep additive sulpher phosphous which eats bronze synchros.This oil does not.

Mobilube shc which is sold in north america will NOT work.

MOBIL 1 IS NOT RECOMMEND (Mobil has NO oil in north america for subaru gearboxes, says MOBIL).

Castrol SYNTRAX which is NOT SOLD in north america is good.

Castrol syntec gearlube sold in north america is not to be used in gearbox (Castrol have NO oils in north america for subaru gearboxes, says Castrol).

In north america there is only a few oils that can be used. SOME but not all of these are quaker state,pennzoil gearplus, royal purple. There is others but what you MUST NOT USE is any GL5 oil that doesn't say it is safe for bronze synchro's. Motul you might use but they will not give you their specs and I don't know why????because all others do.

Redline don't mention safety for bronze synchro's?????? maybe that is why some are having problems with their synchro's when using.

Anyone who would like to challenge this info please call
MOBIL TEC'S 1-800-662-4525 (US)

CASTROL TEC' 1 416 252 5511 (canada)

RON JENNINGS at Royal Purple 1-281-354-8600

Subaru has a problem in that North America sells name brand GL5 oils that are different in other parts of the world and they haven't realised yet some have ep additives that eat synchro's??????

I have spec sheets on
Amsoil 2000/
Castrol Syntec, Syntrax ,hypoy c
Neo RHD
Shell Spirax
Valvoline
Mobilube 1 SHC
Mobilube SHC
Mobil 1
Pennzoil Gearplus
Royal Purple Gearmax

Hope this helps
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Old 03-30-2002, 05:32 AM   #17
okamikatekore
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i had my gearbox oil replaced recently by MRT here in australia,with mobil1 and it grinds like crazy shifting to first i have no idea whether it is the SHC or not but.......
prior to the change i had no grinding issues at all,although the shifter was noncompliant to say the least:monkey:
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Old 03-30-2002, 12:16 PM   #18
tonytiger
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Thank you everybody!

So, Mobilube 1 SHC and Mobilube SHC is very different to serve Subarus needs.

If I understood correctly the Mobilube 1 SHC is the oil I should use and Subies have bronze syncro - right?


I'll try to call the Mobil Finland next week to see what they have to say about the issue. I'll post what they had to say if I find someone who can answer the question.


Keep your thumbs up for Raikkonen (5th in qualifying) and Salo (10th)

Bye for now, post anything related...



tony
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Old 03-30-2002, 12:32 PM   #19
snookem
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okamikatekore

Castrol SYNTRAX is what some are using in Australia.
Read this article thru and it talks about syntrax
http://www.autospeed.com/A_0213/page1.html


Castrols tech in Australia
61 3 9268 4569 ask for Ross

It is sold at these outlets for approx $25 per litre
Autobarn
Supercheap
Repco

Cheers
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Old 04-02-2002, 05:45 AM   #20
tonytiger
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Default What the Mobil Finland had to say...

Called the Mobil Finland for their comment about the issue. The preferred oil for Subaru in General was the Mobilube 1 SHC like snoookem said.

It shouldn't harm bronze synchros and is their most expensive gear oil. They haven't meet any problems due to Mobilube 1 SHC or any synthetic gear oil - what a suprise. Had to ask

The guy which I reached was supposed to be some sort of lubetechnical advisor. He knew the technical me definitions between the oils. The prefferred oil for Subie was however checked from a list.

Any other synthetic gear oil from the Finnish line up wasn't recommended.



tony
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Old 04-02-2002, 07:20 AM   #21
Barry
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snookem- Would you kindly post the oils we can use in our trannies. Thanks
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Old 04-02-2002, 07:01 PM   #22
Coati
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Snookem, I didn't see Valvoline synthetic in your list. Do you have any info on how it rates for Subies?
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Old 04-05-2002, 01:58 AM   #23
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Sorry for being away.

What I didn't say was what I'm using.

Quaker state 75w 90 synthetic

It says on the bottle its ok for synchros too. I have tried 5 oils in the gearbox now and this has been the best(shifting and quietest) and one of the cheapest, $9.62 canadian ltr from napa.

Royal purple shifts great but the gearbox was very noisy and Dale from Teagues Auto has said he knows a guy with Royal purple and his gearbox is also very noisy.

Coati
I tried to get more info on valvoline(not enough info on spec sheet) but was not able to hook up with a tech guy. If you happen to talk with valvoline tech please post here what he says. They probably have oil that's ok but I don't know.

Barry
I for one am not going to say with any certainty that one oil is the best. I will say that you make sure that the oil is NOT going to ruin your bronze synchros. Just a heads up. Talk with the tech people and use some of the phone # I have posted.
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Old 04-05-2002, 02:27 AM   #24
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Old 04-05-2002, 03:17 AM   #25
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Argh. So the grinding noise from my synchros should be cured by me removing the Mobil 1 gear oil and putting something else in there. Glad I spent the money.

Thanks for the info.
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