Transmission oil question for 993
#16
Rennlist Member
This is much like any oil thread found anywhere. Lots of seat-of-the-pants observations and recommendations.
#18
Rennlist Member
From the Mobil site...
Question:
Which Gear Oil Brand is Best for Porsches with Limited Slip Transaxles?
For Porsches with limited slip transaxles, I've heard that Mobil 1 Synthetic Gear Lube LS 75W-90 is too slippery for the synchros and that Mobil Delvac Synthetic Gear Oil 75W-90 is the preferred lube. What's your opinion?
-- Stan Simm, Winston-Salem, NC
Answer:
Mobil 1 Synthetic Gear Lube LS is specifically designed for limited slip differentials. It contains a nominal amount of friction modifier to satisfy the needs of many applications. Mobil Delvac Synthetic Gear Oil 75W-90 is not a limited slip gear oil.
Is Mobil Delvac recommended by Porsche AG? If so, where is that stated?
#19
I guess they both disagree with the makers of the oil.
From the Mobil site...
Question:
Which Gear Oil Brand is Best for Porsches with Limited Slip Transaxles?
For Porsches with limited slip transaxles, I've heard that Mobil 1 Synthetic Gear Lube LS 75W-90 is too slippery for the synchros and that Mobil Delvac Synthetic Gear Oil 75W-90 is the preferred lube. What's your opinion?
-- Stan Simm, Winston-Salem, NC
Answer:
Mobil 1 Synthetic Gear Lube LS is specifically designed for limited slip differentials. It contains a nominal amount of friction modifier to satisfy the needs of many applications. Mobil Delvac Synthetic Gear Oil 75W-90 is not a limited slip gear oil.
Is Mobil Delvac recommended by Porsche AG? If so, where is that stated?
From the Mobil site...
Question:
Which Gear Oil Brand is Best for Porsches with Limited Slip Transaxles?
For Porsches with limited slip transaxles, I've heard that Mobil 1 Synthetic Gear Lube LS 75W-90 is too slippery for the synchros and that Mobil Delvac Synthetic Gear Oil 75W-90 is the preferred lube. What's your opinion?
-- Stan Simm, Winston-Salem, NC
Answer:
Mobil 1 Synthetic Gear Lube LS is specifically designed for limited slip differentials. It contains a nominal amount of friction modifier to satisfy the needs of many applications. Mobil Delvac Synthetic Gear Oil 75W-90 is not a limited slip gear oil.
Is Mobil Delvac recommended by Porsche AG? If so, where is that stated?
I have a almost every Cup and RS and RSR factory manual for cars from ~'98 to '10, they all contain the same info
here's an example from th '07RSR manual
p17
SHC was renamed Delvac in the N. American market a few years ago
#20
Rennlist Member
The question is, was it just renamed or also reformulated for other purposes?
Looks like Mobil is contradicting themselves. If I were a user, I'd ask Mobil to clarify. In my case, no worries as I use the Mobil 75W-90 LS
Looks like Mobil is contradicting themselves. If I were a user, I'd ask Mobil to clarify. In my case, no worries as I use the Mobil 75W-90 LS
#21
The smart money will be placed elsewhere, though I'm sure that Delvac LS is fine too, it's just not necessary for cars w/ our lsd's , maybe there are some lsd's that will benefit, but not ours
#23
Rennlist Member
Alex-Here's the specs...
http://www.mobil.com/usa-english/lub...90_80w-140.asp
BTW, folks, I'm the one who sent in the question to MOBIL1....and I don't buy their answer.
http://www.mobil.com/usa-english/lub...90_80w-140.asp
BTW, folks, I'm the one who sent in the question to MOBIL1....and I don't buy their answer.
#24
Rennlist Member
Alex-Here's the specs...
http://www.mobil.com/usa-english/lub..._80w-140.aspex
http://www.mobil.com/usa-english/lub..._80w-140.aspex
You wonder who they get to answer the questions sent in.
#29
RL Technical Advisor
Mobil 1 LS has friction modifiers to ensure a smooth LSD without "stick-slip".
Mobil 1 Delvac is preferred for track cars where one wants more bite from the LSD and a little "stick-slip" in tight turns doesn't bother anyone. This also helps steel syncros.
Both products are fine, its all about personal preferences.
Mobil 1 Delvac is preferred for track cars where one wants more bite from the LSD and a little "stick-slip" in tight turns doesn't bother anyone. This also helps steel syncros.
Both products are fine, its all about personal preferences.
#30
Racer
Thread Starter
O.K.
Found Mobil 1 Delvac 75W90 at a local OK TIRE store.
While refilling the G50, I also flushed the clutch slave cylinder.
Lots of dirty fluid in there. Where is the contamination coming from?
Long 6000 Km trip to UT/AZ visiting Escalante and Bryce Canyon again.
Used one quart total; very nice!
The 20 Mile uphill curvy route out of Torrey, UT, is a dream.
Since 15W50 Mobil 1 Synthetic is hard to find in Canada, I was lucky to get it at a Walmart in Yakima, WA.
2 containers with 5 Qts each for $50.00 total is a deal!
Found Mobil 1 Delvac 75W90 at a local OK TIRE store.
While refilling the G50, I also flushed the clutch slave cylinder.
Lots of dirty fluid in there. Where is the contamination coming from?
Long 6000 Km trip to UT/AZ visiting Escalante and Bryce Canyon again.
Used one quart total; very nice!
The 20 Mile uphill curvy route out of Torrey, UT, is a dream.
Since 15W50 Mobil 1 Synthetic is hard to find in Canada, I was lucky to get it at a Walmart in Yakima, WA.
2 containers with 5 Qts each for $50.00 total is a deal!