Jump to content

The RennTech.org community is Member supported!  Please consider an ANNUAL donation to help keep this site operating.
Click here to Donate

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)

Got a Boxster for Birthday! Oil Question


Recommended Posts

Just got a 98 Boxster for my Birthday. Now I have two Porsches! First question is: can I drive it for a few more days on the old oil until I get it changed this weekend. The car has 57K miles. Last owner changed oil 1.5K miles ago. So he drove the car very little over the last year since the last oil change, but it's been a year. It's fairly dry here in Colorado, and the car has always been garaged. Should I change immediately, or can drive it a few hundred miles until I get the oil changed this weekend? IMS failure a huge issue on these 98's? The oil looks clear and like new when I check on the dipstick.

 

The engine sounds excellent. I can hear the chain rattle momentarily when I start it cold. Also, plan to use Driven DT40 oil that I have an extra case of (bought it for my Cayenne, but have enough to do the Boxster) and it's 5W40.

 

Thanks! I'm really enjoying the car -- it's not a 420 HP MKIV that used to have, but it's almost as fun.

Mike

Edited by Supra-p!g
typo
Link to post
Share on other sites
    You can remove these ads by becoming a Contributing Member.

  • Moderators

I would change the oil because of its age; used oil can break down over time from action of the contaminants on the additive package.  The DT40 is an excellent choice.

 

A 98 would have the dual row IMS, which is one of the strongest.  Dual rows do fail, but at a much lower rate than the later single row bearings.

Link to post
Share on other sites

But will it kill the engine to drive with the oil you have for a hundred miles or three days?  Probably not but, as JFP said, definitely change the oil, oil filter and crush ring as soon as you can.  And then look at new brake fluid.

 

But the net can only tell you "probably" because stuff happens.

Link to post
Share on other sites

If you want the full effect of the Driven 5W40, you need to do a flush (200-400 miles) with BR30 first. The Driven oil products fight many other oil companie's additive packages. The Driven products are not Porsche A40 approved (there are over 200 oils on the list), if that matters to you. If you elect not to do the flush, you will not see the true benefit of the Driven 5W40 for about 3 oil change cycles (due to the cross pollination). This could easily be 2-3 years for most owners. This flush process come directly from the oil's developers (L. Speed and J. Raby).

 

If it were my Birthday-Boxster (BIG congrats, BTW), I'd use Mobil 5W50, and call it a day. My Mobil 5W50 UOA's (Blackstone Used Oil Analysis) have always exceeded the Driven in my 987S and 991S.

Link to post
Share on other sites
  • Moderators
2 hours ago, White987S said:

IIf it were my Birthday-Boxster (BIG congrats, BTW), I'd use Mobil 5W50, and call it a day. My Mobil 5W50 UOA's (Blackstone Used Oil Analysis) have always exceeded the Driven in my 987S and 991S.

 

Exceeded the DT how?

 

We have converted over dozens of customers from other oils to the DT40 by a simple through drain and refill without any consequences, and with excellent UOA's as well.

Link to post
Share on other sites
16 minutes ago, JFP in PA said:

 

Exceeded the DT how?

Better (lower) wear metals. Alum, Iron, and Copper.

Better high shear, high temp, stability. Oil stays in grade longer, over the drain interval.

Better zinc levels.

Better phosphorus levels.

 

DT40 is a good product, slightly better than Mobil 0W40. My experience is that Mobil 5W50 is slightly better again than DT40, with the added advantage of; being A40 approved, has far less cross polination issues, and much easier to purchase (Napa Auto Parts).

Link to post
Share on other sites
  • Moderators

Interesting.  We have collected quite a few UOA's on the DT product, and they have consistently out performed similar mileage M1 5W-50 samples, and absolutely buried the M1 0W-40 product.

Link to post
Share on other sites
  • 2 weeks later...

Got my oil changed. The oil filter had a layer of sludge on the bottom. Cleaned it out, but I think the prior owner had the car sit in his garage for most of every year, except for 1500 miles a year. The oil came out clean, and looked like new. Also had the car put on the computer and the cam positions read 0 and -1. Bob said that the engine seems very well taken care of. 57K miles, now has 58.5K after driving to work for 8 days, at 180 miles a day.

 

Also, apparently I have "auto start." I thought it was supposed to be like this -- I put the key in turn it and press the clutch -- the car cranks and starts by itself.

Link to post
Share on other sites
8 hours ago, Supra-p!g said:

Also, apparently I have "auto start." I thought it was supposed to be like this -- I put the key in turn it and press the clutch -- the car cranks and starts by itself.

Sounds like a prior owner bypassed the clutch microswitch.

Link to post
Share on other sites

You still have to press the clutch in to get it to start. The engine cranks and starts without having to hold the key to the left. I can just put the key in turn it to the left and let go. As soon as I press the clutch pedal the car cranks and starts on it's own -- no hands. 

 

I was wondering if the sludge could be in motor as well if I found it on the filter housing.

Link to post
Share on other sites
7 hours ago, Supra-p!g said:

 

 

I was wondering if the sludge could be in motor as well if I found it on the filter housing.

I suggest you do another oil change in 1,000 miles, and send a sample off to Blackstone Labs for a baseline UOA. Then, rinse & repeat every 5,000 miles. Yearly at a minimum. Order your free sample kits today.

Link to post
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.

  • Similar Content

    • By Paul Hasbany
      Hi there! 1st off, thank you for reading this! 2nd, is there a way to add a little more HP? 
       
      Thx all!

    • By Jrfishel1
      I have a 2003 Boxster base model (2.7) with auto. Current showing code P0600 and DTE 61. Had a few different Porsche mechanics look at the issue and have not found a solution.  Cleaned the electrical connection at the transmission and verified the ground connections at the tiptronic control module. Had the DME, tiptronic module and immobilizer checked and they were found to be working.
       
      Does the Can-bus connection between the DME and the tiptronic module extend to the immobilizer or other modules? All I could find is information up to the 2001 model year.
       
      Looking for a reason why the DME Is not communicating with the tiptronic and how to test the Can-bus circuit.  Is there a wiring schematic available for the 2003/2004 boxster?
       
      Thanks,
       
      jason
    • By Kodai
      Hi all 986 guys.
      I will post for the first time.
      I have '98 986K(Tip-s),Can I swap 5-Speed(or 6-Speed) manual transmission?
      In other words, prepare missions, pedals, manual transmission CPUs, etc. like a typical car model (for ex, BMW).
      Is it possible to update only the mission, not the upgrade to 3.4L?
      Has anyone ever seen or heard of such a vehicle?
      I can find 986K 5speed as much as I want, but I want to stick to my one.
       
      Thank you!!

       
    • By Sea_Galley
      1999 986 2.5 Boxster. (5 spd)
       
      Not many problems with the car but cruise control doesn’t work and the spoiler only extends halfway or so.
       
      Current actual problem with the car is that I  can feel vibration or shaking in the steering wheel (and in the car to a much lesser extent) after shifting into fourth gear. After shifting into fourth gear, the shaking seems to persist even as I slow down, or after shifting into fifth. It will persist even if I shift into neutral but will stop after I come to a stop.
       
      It’s strange to me that this is the case when gears 1-3 don’t have this problem. I am guessing that it’s an issue with bearings or alignment in the front wheels since i’m feeling the vibrations in the wheel but hopefully someone here has a better idea.
    • By Garra671
      Tried googeleing it but couldn’t find what I was after.    Was curious if anyone knows what type of flat 6 the 986 boxster has?
       
      Is it a a true boxer engine? Or a horizontally opposed flat V?     True boxer meaning it has individual crank pins for each piston and is a true 180degree angle.    Thanks in advance 
×
×
  • 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.