dream4

The check oil light went off on my 02 996 last night. It has 4200 miles. What weight Mobil 1 synthetic should I use?

LanceK

Your owner's manual gives you all the specs on what weight to use.

SPR

0/40 or 10/40 synthetic

Waz996

I know this might sound silly,

when do we have to change mobil-1 oil? i mean do we keep on adding and adding for ever?!

waz

mooty

PCNA says change every 15k, i do my at 6000 just for my own sanity. in between oil changes, you just top off. on my C2, i added about 8 qt in 13000 miles. in my C4S i added 3 qt before RMS leaked. after taht, i added lots of oil until it's fixed.

Trojan Man

I bought mine used 2 years old from a dealer - it had 8000 miles. After putting 2000 more miles on it, I needed to add a full quart. I guess this is on par with most other people.

<img border="0" alt="[cheers]" title="" src="graemlins/beerchug.gif" />

Fadz

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Waz996:
<strong>I know this might sound silly,waz</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">The dealer in Dubai does every 10,000 KM ?!

Khalid

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Fadz:
<strong> </font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Waz996:
<strong>I know this might sound silly,waz</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">The dealer in Dubai does every 10,000 KM ?!</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">Acctually the weather in UAE is really hot and you know how hard we drive our cars here so each 10,000KM its good
you get ur Air filter -- oil filter -- oil all changed

craigg

Hmmm.

Technically, synthetic oil should not be affected by heat so I am intrigued by the change frequency in Dubai (I have been there - and yes it is hot - in the summer!). The main reason synthetic was invented in the 1950s was for jet engines. Seems the longer molecules of organic oil would break down from heat so synthetic was devised with shorter and MUCH more stable molecules for this very reason. So it was for heat survivability, not low friction that was the primary goal for it's beginnings. Slippery is a secondary benefit. I doubt your engine gets as hot or demanding as a jet engine - maybe a turbo under constant boost could get close.

The Porsche recommended change frequency here in Canada is 24,000 km and technically the cold weather is harder on engines and their oil than the hot (due to the creation of condensation and moisture in the crankcase and sump).

Now hard or sustained high speed driving WOULD be cause for a more frequent change so if that is why, so be it.

dream4

The owners manual says for ambient temp &gt;50 use 10w40/15w40/15w50, and for temp &lt;50 use 10w40/10w30/5w30. I've seen several posts recommending 0w40. Is zero weight good for New England driving?

Loren

Porsche approved oils as of Feburary 2003

<img src="http://pw1.netcom.com/~ljcook/oc/images/oils.gif" alt=" - " />

dream4

Thanks Loren - is that from the 03 owner's manual?

Loren

No, it is from the TSB "Engine Oils Approved by Porsche" dated February 28, 2003. This is for all models and all years of 996's.

There are separate (but similar) TSBs for Boxster and TT/GT2, and even the new GT3.

LanceK

I'm confused now!!!!

Loren's post is a lot different than the owner's manual recommendations, which dream4 quoted.

I figure the 0W40 is good for break in since tolerances are tight and it might allow a little "extra" friction to let things set in. But 0W40 is not only completely absent from the owner's manual, but try finding it in a store!

I just went out last night and bought every quart of 15W50 I could find including Wal-Mart, Aid auto stores, AutoZone etc. And that seams to be a lot more popular than 0W40.

Anybody know the real deal?

Loren

There is nothing wrong with 15W50 (Mobil 1). Porsche recommended that up until about a year ago. My car (as I am sure many cars) are still running 15W50.

For whatever reason Porsche has issued a Technical Service Bulletin that states (to dealers) that they are to use one of the approved oils (primarily 0W40).
I just bought 3 cases of 0W40 from Autozone and my next oil change I will convert to 0W40 (Mobil 1). This is just like tires... as they see improvements (or problems) they change their recommendation.

Again, nothing wrong with the 15W50 I would go ahead and use it (as long as you live in a warm climate).