cbr92901

Was looking thru the owners manual today, and noticed it recommends 10W40 - been using 0W40. 2004 4S in GA. Is she gonna blow?

btw, I keep my phone in the cubbie under the radio.

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Wayne Smith

It sounds like it's time to part her out before all value is lost. Good thing you didn't wait any longer to bring up your question!!!

GLWS

DTMiller

I mean, yeah, this has been done. Search is your friend.

kromdom

no way has OIL ever been discussed for the 996......it has only been out since '99 (insert wink-wink, sarcasm emoticon here)
P.S. It could be possible that the OP is TROLL-ing though

docmirror

Big subject. Short answer, is maybe. Shorter answer is - no.

Search is your friend here. About six recent threads on oil with good info.

If you don't want to search here, go to your oil website and compare the two oils from the product data sheet. Look for the viscosity index, higher is better and look for the viscosity in cSt @ 40 and 100C. They should be close between two oil types.

dgjks6

Assuming not a troll and a real question - so here goes - ignore the manual for oil recommendations. They update with tsb's where 0w40 is fine. Any a40 is fine.

My 1999 owners manual recommended 10w30 and could use regular or synthetic.

Ahsai

Use this Porsche approved oil list

https://rennlist.com/forums/996-forum/923972-new-2015-list-of-porsche-approved-a40-oils-and-a-strange-change.html

targa996

The a40 approved Mobil 1 is 0w40.... I noticed my buddy was using 10w40 high mileage at track day in his boxster - and no, the engine didn't blow. Viscosity at 100c is slightly better I believe and Zddp is similar - only at cold start will there be a viscosity difference - but since you are not in ultra cold Climate this shouldn't matter ...

If you change at around 5k, why not do a used oil analysis to show if there are any problems ?my guess is no .

I was thinking of changing to this at next o/c to see if it dries up some of my oil weeps ....

docmirror

Since the Mobil 1 is a class III hydrocracked petroleum product, and not a class IV PAO or Ester, changing to any different hydrocracked petro product won't have any effect on your seal leaks. The issue with seal leaks was related to the seals swelling under the different chemistry of the class IV lubricant, and none of the US makers offer any class IV products. There is one company that offers a class III/IV blend, but they won't tell consumers what the blend ratio is, and since the class IV base is about double the cost to produce, I can hazard a qualified guess that it's prolly 90% petro, and 10% PAO or something like that. Not worth the higher cost to get a small gob of truely syn base.

targa996

I mean the high mileage oil - has extra seal conditioners - and maybe that will help ....