75W90 vs 75W140 transmission & diff oil
07-05-2012, 08:30 PM
#31
thanks for your contribution and it's good to know I can probably use a good 75W90 without potentially increasing wear. I don't know about "money is no object" as I don't earn all that much. My S cost me quite a bit (local car prices are a bit mad) so I am trying to be doubly sure I don't blow anything up or increase wear to lead to additional unnecessary downtime. My family life and work don't allow the luxury to spend all that much time at the shops. To compound that, I dont think there is a local UOA service so it is not very convenient to keep sending my fluids to the US for analysis.
In any case, I take the opinions combined with data points like UOA to make a decision and frankly am very grateful at the generosity of the community with regards to info sharing. I'll be the first to admit that I don't know much (if at all!) about the dynamics of oils but it's nice to know people are willing so water it down to I can at least understand the gist of it.
In any case, I take the opinions combined with data points like UOA to make a decision and frankly am very grateful at the generosity of the community with regards to info sharing. I'll be the first to admit that I don't know much (if at all!) about the dynamics of oils but it's nice to know people are willing so water it down to I can at least understand the gist of it.
07-05-2012, 09:50 PM
#32
Originally Posted by c32b' timestamp='1341541305' post='21837365
thanks for your contribution and it's good to know I can probably use a good 75W90 without potentially increasing wear. I don't know about "money is no object" as I don't earn all that much. My S cost me quite a bit (local car prices are a bit mad) so I am trying to be doubly sure I don't blow anything up or increase wear to lead to additional unnecessary downtime. My family life and work don't allow the luxury to spend all that much time at the shops. To compound that, I dont think there is a local UOA service so it is not very convenient to keep sending my fluids to the US for analysis.
In any case, I take the opinions combined with data points like UOA to make a decision and frankly am very grateful at the generosity of the community with regards to info sharing. I'll be the first to admit that I don't know much (if at all!) about the dynamics of oils but it's nice to know people are willing so water it down to I can at least understand the gist of it.
In any case, I take the opinions combined with data points like UOA to make a decision and frankly am very grateful at the generosity of the community with regards to info sharing. I'll be the first to admit that I don't know much (if at all!) about the dynamics of oils but it's nice to know people are willing so water it down to I can at least understand the gist of it.
As for the self confirming bias types, staying clear is probably the best use of time.
07-06-2012, 08:48 AM
#33
Registered User
Join Date: Jan 2006
Location: 17 ft below sea level.
Posts: 4,949
Likes: 0
Received 21 Likes
on
16 Posts
The hypoid gears have a lot of sliding going on, that's just how it is.
They need good oil, especially on the track.
The less your oil is chewed-up by the ring&pinion the less it will change the Torsen behavior.
As for the trans: there are good quality true trans oils available.
75W-140 is way too thick.
07-06-2012, 09:46 AM
#34
I use amsoil engine oil (10w-30), trans fluid (5w-30 I believe but has additives for smooth tranny operation), and diff fluid.
The amsoil 75w-140 is absolutely the best thing I've ever experienced. It makes the diff seem SOLID and responsive in comparison to the stock 75w-90 fluid. I recommend everyone use amsoil 75w-140 in their diff, even though it is expensive, and will make you lose a bit of noticeable power. (3-4hp) Heck, I'm so happy with amsoils stuff I would say their motor/trans/diff fluid is the only way to go thru out your drivetrain.
The amsoil 75w-140 is absolutely the best thing I've ever experienced. It makes the diff seem SOLID and responsive in comparison to the stock 75w-90 fluid. I recommend everyone use amsoil 75w-140 in their diff, even though it is expensive, and will make you lose a bit of noticeable power. (3-4hp) Heck, I'm so happy with amsoils stuff I would say their motor/trans/diff fluid is the only way to go thru out your drivetrain.
07-07-2012, 08:11 PM
#36
07-10-2012, 09:08 AM
#40
Registered User
Join Date: Jun 2001
Location: Bellingham, WA
Posts: 831
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by dhayner' timestamp='1341718007' post='21842086
Okay, is xviper back or not?
... just hurts too much.