Jump to content

Server Lease Renewal/Software Licenses

Our yearly server lease, software licenses, as well as hardware operating costs, ARE due Dec 6th, 2021. Our current donations have fallen far short of the funds we need to renew. Please remember the RennTech.org community is Member supported so please consider a donation to help...  THANK YOU!

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

Is Mobil 1 75w-90w LS good or bad for 1997 Boxster 5 speed manual Transmission.


Recommended Posts

Hi Ike,

        If you go to Mobil website you will find that they are non-committal when it comes to transmission oil. Yes,they  do have a function on website for engine oil and nothing else.I reach out to them a couple of days ago and I am waiting for a reply.As a man that totally brought a Boxster back to life after a rollover I am pretty good.I was responsible for all recalls,because Porsche wrote me off.Right now I am going to Redline which has a lot of information regarding my car.

COSTCO PARKING LOT WITH 986.jpg

Link to comment
Share on other sites

  • Moderators

Porsche has typically used gear oils that are designed to their specifications, particularly in the five speeds because of the synchro ring materials of construction.  As the result, the factory fill gear oils lack any API or "G" gradings because they are unique.  A lot of the smaller aftermarket suppliers claim they have "equivalent" products, that in reality are not.  Over the years, I have lost count of how many gallons of aftermarket gear oils we have drained out of customer cars due to complaints of poor shifting, particularly in the cold, noise, etc.  And that includes a lot of Redline, Royal Purple, and Amsoil products. And except for transmissions that had sustained damage while using these aftermarket products, every time we switched the car back to the factory fill, all the customer's issues disappeared.

 

Years ago, we contacted all the major gear oil vendors looking for a true match to the factory gear oils; Mobil 1 summed up best when they told us that "Porsche uses totally unique gear oil formulation requirement's, which are made to their specifications, and which do not match any of our off the shelf offerings. And as Porsche represents such a small segment of the overall market, we will not be attempting to replicate their formulation requirements."

  • Upvote 1
Link to comment
Share on other sites

be very careful, i had a gearbox that was destroyed because the previous owner used aftermarket transmission fluid.

 

also Porsche has changed their recommendation over time.  last I looked they are now recommending Shell transaxle gear oil , at least for the 996TT's Getrag.

 

this ain't like motor oils where it's "take your pick"..........

Link to comment
Share on other sites

Hi Ike,

        If you go to Mobil website you will find that they are non-committal when it comes to transmission oil. Yes,they  do have a function on website for engine oil and nothing else.I reach out to them a couple of days ago and I am waiting for a reply.As a man that totally brought a Boxster back to life after a rollover I am pretty good.I was responsible for all recalls,because Porsche wrote me off.Right now I am going to Redline which has a lot of information regarding my car.

Link to comment
Share on other sites

Redline???  That's exactly what ruined my gearbox.  It's your car and your money but I don't want something bad to happen to you like it did to me -- you really need to be careful here or this is what you could have in store in your future:

Capture.JPG.39ade4c8e58ea8c8a4fef6db9c33fb7a.JPG

 

Edited by Silver_TT
Link to comment
Share on other sites

  • Moderators
33 minutes ago, boxstermuscle said:

Thank you Silver_ _TT and JFP for your valuable information.I guess I'm going with the Porsche Stuff.I was going to try Mobil 1 Delvac if I couldn't get the Porsche Stuff.Thank You Guys

 

Contact board sponsor Sunset Porsche, they have a great website and carry it in stock.  The factory stuff is full synthetic and has a long life. 😉

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.