The dealer said they use Mobillube PTX 75W-90. Someone else said they use Delvac 75W-90. What are the differences and what is preferred here? I obviously do not want to destroy the gearbox.
2012 Porsche 997.2 Gearbox
- Thread starter jtwrace
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6sp manual
According to Mobil's website, that stuff is specially designed for the 911 gearbox.
http://www.mobil.com/Italy-English/Lubes/PDS/GLXXENPVLMOMOBILUBE_PTX_75W-90.aspx
Looks like any other 75w90 though...
http://www.mobil.com/Italy-English/Lubes/PDS/GLXXENPVLMOMOBILUBE_PTX_75W-90.aspx
Looks like any other 75w90 though...
Originally Posted By: dparm
Looks like any other 75w90 though...
You'll notice no mention of GL-5 or J2360. I tried to find this oil on Mobil.us and came up empty.
Looks like any other 75w90 though...
You'll notice no mention of GL-5 or J2360. I tried to find this oil on Mobil.us and came up empty.
Hey jtwrace like your sig. I've got a couple books from Geddes and learned quite a bit from the man. Cheers!
"Science is not a democracy"-Earl Geddes Ph.D."
Absolutely.
"Science is not a democracy"-Earl Geddes Ph.D."
Absolutely.
Originally Posted By: martinq
Originally Posted By: dparm
Looks like any other 75w90 though...
You'll notice no mention of GL-5 or J2360. I tried to find this oil on Mobil.us and came up empty.
I also found that unusual. Amsoil says "no product recommendation" and that you should use the Porsche fluid. Red Line, however, says you can use this in the MT:
http://www.redlineoil.com/product.aspx?product=58304
Originally Posted By: dparm
Looks like any other 75w90 though...
You'll notice no mention of GL-5 or J2360. I tried to find this oil on Mobil.us and came up empty.
I also found that unusual. Amsoil says "no product recommendation" and that you should use the Porsche fluid. Red Line, however, says you can use this in the MT:
http://www.redlineoil.com/product.aspx?product=58304
Originally Posted By: dparm
Red Line, however, says you can use this in the MT:
http://www.redlineoil.com/product.aspx?product=58304
That makes perfect sense as you need the GL-5 type of performance for the hypoid but you also need to allow the synchros to function well. MT-90 is similar but without the hypoid compatibility.
Red Line 75W90 NS
- Designed for transmissions and transaxles
- helps to slow synchros for easier shifting across a broad temperature range
- Popular in Ferrari, Porsche and Subaru transaxles
I'm surprised that Amsoil does not have a similar product. My recommendation would be for:
Motul Gear 300.
http://www.amazon.com/MOTUL-GEAR-300-SYN-HYPOID/dp/B0022ZHQ80
http://www.motul.com/ca/en-US/products/106?f[application]=141
http://www.motul.com/system/product_desc...%2075W90_GB.pdf
Red Line, however, says you can use this in the MT:
http://www.redlineoil.com/product.aspx?product=58304
That makes perfect sense as you need the GL-5 type of performance for the hypoid but you also need to allow the synchros to function well. MT-90 is similar but without the hypoid compatibility.
Red Line 75W90 NS
- Designed for transmissions and transaxles
- helps to slow synchros for easier shifting across a broad temperature range
- Popular in Ferrari, Porsche and Subaru transaxles
I'm surprised that Amsoil does not have a similar product. My recommendation would be for:
Motul Gear 300.
http://www.amazon.com/MOTUL-GEAR-300-SYN-HYPOID/dp/B0022ZHQ80
http://www.motul.com/ca/en-US/products/106?f[application]=141
http://www.motul.com/system/product_desc...%2075W90_GB.pdf
Last edited:
Originally Posted By: Rand
shared sump with MT/front diff etc.
The 997 is a rear-engine, RWD application with AWD on some models I believe (haven't looked it up). Without digging deeper I would assume the hypoid shares fluid with the rest of the transmission.
shared sump with MT/front diff etc.
The 997 is a rear-engine, RWD application with AWD on some models I believe (haven't looked it up). Without digging deeper I would assume the hypoid shares fluid with the rest of the transmission.
Originally Posted By: Rand
Originally Posted By: jtwrace
6sp manual
I knew that much I was looking more for
fwd rwd awd
shared sump with MT/front diff
etc.
RWD. Really a transaxle.
Originally Posted By: jtwrace
6sp manual
I knew that much I was looking more for
fwd rwd awd
shared sump with MT/front diff
etc.
RWD. Really a transaxle.
Originally Posted By: martinq
Hey jtwrace like your sig. I've got a couple books from Geddes and learned quite a bit from the man. Cheers!
"Science is not a democracy"-Earl Geddes Ph.D."
Absolutely.
Sorry...just saw this! Very nice to hear that you have read some of his papers. The man is brilliant. I own his products as well.
Hey jtwrace like your sig. I've got a couple books from Geddes and learned quite a bit from the man. Cheers!
"Science is not a democracy"-Earl Geddes Ph.D."
Absolutely.
Sorry...just saw this! Very nice to hear that you have read some of his papers. The man is brilliant. I own his products as well.
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