Gear oil for your 993
10-31-2006, 11:11 AM
#46
Weathergirl
Rennlist Member
Rennlist Member
FYI, "notchy" shifts (i.e. syncros not working too well) is the #1 complaint from people who use Non-SHC Mobil1 gear oil. The SHC supposedly shifts much better.
10-31-2006, 11:23 AM
#47
Three Wheelin'
Originally Posted by 993BillW
I got my car a couple of months ago w/ a little under 67k mi. It had the 60k service at apx. 64k mi. and I believe they used Mobil 1 gear oil in the gearbox, it did look fairly clean when I drained it too. Since I aquired the car, shifting from 1 to 2, 2 to 3 and to a lesser extent 3 to 4 has felt "notchy", I expect the syncros are worn but not bad enough to warrant replacing anytime soon.
As part of my self service program a couple of weeks ago I replaced the gear oil w/ the MLT-R gear oil, after driving the car for a couple hundred mi. the shifts are MUCH smoother now, both cold and warm. I would recommend this gear oil to anyone considering a change.
As part of my self service program a couple of weeks ago I replaced the gear oil w/ the MLT-R gear oil, after driving the car for a couple hundred mi. the shifts are MUCH smoother now, both cold and warm. I would recommend this gear oil to anyone considering a change.
10-31-2006, 12:53 PM
#48
Three Wheelin'
1 gallon of the MTR-L.
BTW, I have been using the MTL-R for many weeks now and I LOVE IT. Even to the point of reviewing it on the website. The notchy feeling is greatly reduced when cold and when warm it shifts much better. I believe this product is smoother than M-1 at all temps.
Good luck.
TJ
BTW, I have been using the MTL-R for many weeks now and I LOVE IT. Even to the point of reviewing it on the website. The notchy feeling is greatly reduced when cold and when warm it shifts much better. I believe this product is smoother than M-1 at all temps.
Good luck.
TJ
10-31-2006, 01:09 PM
#50
Race Director
Originally Posted by jnx
TJ, or anyone else, I really don't have any shifting problems just going to change it from a maint. issue, do you suggest MLT-R?
As TJ says it's just under 1 gal., I think 3.9 qts. I still have a little in the gal. jug but I don't fill it up so that it comes out the fill plug because it's cold on the fill. I'll check it when it's warm and top up if necessary.
10-31-2006, 01:31 PM
#52
Three Wheelin'
Originally Posted by jnx
TJ, or anyone else, I really don't have any shifting problems just going to change it from a maint. issue, do you suggest MLT-R?
BTW, Mobil tech support specifically does not recommend GL-5 gear oils for trannys recommending GL-4. Despite what I heard at the local part stores, GL-5 and GL-4 are not interchangable. Using a GL-5 oil in a tranny specing GL-4 oil is a really bad idea. Royal Purple and SF are dual rated GL-4 and 5. M-1 is GL-5 ONLY!!!! Read your owners manual for recommended rated oil for your non-pcars...
To follow-up - I had a little left over using the the gallon jug even when changing when not cold. Maybe it was because the car was only jacked on one side when I changed it. I doubt it makes a difference when changing hot or cold - I would think the engineers would account for oil expansion at all temp ranges and must allow a certain amount of air volume when that stuff is slinging around while driving.
10-31-2006, 04:07 PM
#53
G50/20/21/30/31/32/33 factory rec. fill is 3.6 liter SAE 75w90 API class GL-5(or Mil-L 2105 B)
The word from the top Porsche trans guys in the world is Mobilube SHC
Mobilube SHC
The word from the top Porsche trans guys in the world is Mobilube SHC
Mobilube SHC
10-31-2006, 07:42 PM
#54
Rennlist Member
According to Mobil, the SHC designation has been discontinued - and the same product repackaged under their Delvac label: specs are here .
I had recently attempted to source SHC/Delvac locally via Esso/Mobil - and spoke with their Product Specialists in both Toronto & Halifax: strangely enough, they both advised against using the Delvac 75W-90 version in our transaxles ... recommending instead the regular Mobil 1 flavour. When challenged as to why this recommendation, their responses were identical - " that Delvac does not have the addititive package required for LSD type transaxles, whereas Mobil 1 does."
That advise was about as welcome as a shot of the proverbial yellow stuff into the family pickle jar, for all the prevailing wisdom had indicated SHC as the juice of choice. The last shot was on local availability .... indeed it is - in 20 liter pails at ~ $400 .... so I would need four more to chip in for a group buy
.
Their comment on LSD additive being lacking was interesting, for with most clutch type diffs, a secondary 2-4 oz bottle of friction enhancer is frequently added on first fill to address this issue as recommended by both the vehicle manufacturer and lube supplier: they indicated no such alternative.
Anyway, it is reassuring to read that SHC has a strong track record with Porsche - but disappointing to not hear that echoed by the manufacturers representatives ...
I had recently attempted to source SHC/Delvac locally via Esso/Mobil - and spoke with their Product Specialists in both Toronto & Halifax: strangely enough, they both advised against using the Delvac 75W-90 version in our transaxles ... recommending instead the regular Mobil 1 flavour. When challenged as to why this recommendation, their responses were identical - " that Delvac does not have the addititive package required for LSD type transaxles, whereas Mobil 1 does."
That advise was about as welcome as a shot of the proverbial yellow stuff into the family pickle jar, for all the prevailing wisdom had indicated SHC as the juice of choice. The last shot was on local availability .... indeed it is - in 20 liter pails at ~ $400 .... so I would need four more to chip in for a group buy
.Their comment on LSD additive being lacking was interesting, for with most clutch type diffs, a secondary 2-4 oz bottle of friction enhancer is frequently added on first fill to address this issue as recommended by both the vehicle manufacturer and lube supplier: they indicated no such alternative.
Anyway, it is reassuring to read that SHC has a strong track record with Porsche - but disappointing to not hear that echoed by the manufacturers representatives ...
10-31-2006, 08:10 PM
#55
Three Wheelin'
Garth - your right - thanks for the refresher.... I wonder when you see it for sale on the web if its NOS or the distributors are still getting a supply from Mobil.......
BTW, I always thought that SWEPCO was some european brand since their products are always found in the porsche supply houses. Quite the contrary. SWEPCO stands for Southwestern Petroleum Corporation out of TX:
http://www.swepcousa.com/
Anyway, there was some discussion at BITOG that Swepco is relabelled Shaeffers which is supposed to have a good following as a porsche gear oil as well......
BTW, I always thought that SWEPCO was some european brand since their products are always found in the porsche supply houses. Quite the contrary. SWEPCO stands for Southwestern Petroleum Corporation out of TX:
http://www.swepcousa.com/
Anyway, there was some discussion at BITOG that Swepco is relabelled Shaeffers which is supposed to have a good following as a porsche gear oil as well......
10-31-2006, 08:31 PM
#56
Race Director
Originally Posted by tj90
To follow-up - I had a little left over using the the gallon jug even when changing when not cold. Maybe it was because the car was only jacked on one side when I changed it. I doubt it makes a difference when changing hot or cold - I would think the engineers would account for oil expansion at all temp ranges and must allow a certain amount of air volume when that stuff is slinging around while driving.
10-31-2006, 08:47 PM
#57
Rennlist Member
Originally Posted by Garth S
According to Mobil, the SHC designation has been discontinued - and the same product repackaged under their Delvac label: specs are here .
I had recently attempted to source SHC/Delvac locally via Esso/Mobil - and spoke with their Product Specialists in both Toronto & Halifax: strangely enough, they both advised against using the Delvac 75W-90 version in our transaxles ... recommending instead the regular Mobil 1 flavour. When challenged as to why this recommendation, their responses were identical - " that Delvac does not have the addititive package required for LSD type transaxles, whereas Mobil 1 does."
That advise was about as welcome as a shot of the proverbial yellow stuff into the family pickle jar, for all the prevailing wisdom had indicated SHC as the juice of choice. The last shot was on local availability .... indeed it is - in 20 liter pails at ~ $400 .... so I would need four more to chip in for a group buy .
Their comment on LSD additive being lacking was interesting, for with most clutch type diffs, a secondary 2-4 oz bottle of friction enhancer is frequently added on first fill to address this issue as recommended by both the vehicle manufacturer and lube supplier: they indicated no such alternative.
Anyway, it is reassuring to read that SHC has a strong track record with Porsche - but disappointing to not hear that echoed by the manufacturers representatives ...
I had recently attempted to source SHC/Delvac locally via Esso/Mobil - and spoke with their Product Specialists in both Toronto & Halifax: strangely enough, they both advised against using the Delvac 75W-90 version in our transaxles ... recommending instead the regular Mobil 1 flavour. When challenged as to why this recommendation, their responses were identical - " that Delvac does not have the addititive package required for LSD type transaxles, whereas Mobil 1 does."
That advise was about as welcome as a shot of the proverbial yellow stuff into the family pickle jar, for all the prevailing wisdom had indicated SHC as the juice of choice. The last shot was on local availability .... indeed it is - in 20 liter pails at ~ $400 .... so I would need four more to chip in for a group buy
.Their comment on LSD additive being lacking was interesting, for with most clutch type diffs, a secondary 2-4 oz bottle of friction enhancer is frequently added on first fill to address this issue as recommended by both the vehicle manufacturer and lube supplier: they indicated no such alternative.
Anyway, it is reassuring to read that SHC has a strong track record with Porsche - but disappointing to not hear that echoed by the manufacturers representatives ...
10-31-2006, 09:36 PM
#58
Rennlist Member
Originally Posted by 92964cab
Well, I just ordered a gallon of SHC from the link Bill V. provided... guess they will tell me it isn't available?
11-03-2006, 06:17 PM
#59
Track Day
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is all the 993 having problem with the 2nd gear. my C4s is ok. (I don't no what type of oil is in there) My cousing is manager at porsche and he told me he used to sell amsoil for gear oil and it was very good. now he must sell mobil 1 oil and it not SHC. Is somebody out there using amsoil.
12-29-2006, 03:48 PM
#60
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Wanted to offer an update for the MTR-L oil. I changed the fluid about one month ago because of some syncro issues, first was difficult to engage at times when cold, second was very "notchy" especially when cold and even third would get a clunk at times. This stuff is amazing. Old fluid was Sweepco, not very old, MTR-L enables smooth shifting when cold, silky when warm, fast shifting no problem. Highly recommend for others considering a change.