ReinerFink

And be sure to get a new set of Monroes when the olds wear out, because that is what the factory used, so it must be good.

-reiner

ironimages

+1... Mobil 1 is not what it was, it's Torco for my car and no Wal-Mart doesn't sell Torco.

helmet155

Charles Navarro and Steve Weiner say Brad Penn or Swepco.

And...I bet they have done more oil analysis than anyone on this or Pelican's site for the M64 engine.

pp000830

For a 993 oil with slightly higher Phosphorus level has the property of reducing scuffing on the valve mechanism. Recently most oils have reduced this component in their oils to extend CAT life. When the 993 was built it used the earlier oils with higher content.
Here are oils with the higher content from the Mobil 1 web site:
Mobil 1 0w-40, 5w-30, 15w-50,
They also have some oils with very high Phosphorus levels for racing and motorcycles; these would be hard on the CATs in your car.
My experience is that I have never had an oil related engine failure.
With 993s when starting in cold weather using a heavier grade of oil will cause the delicate hydraulic lifter seals to fail and cause the dreaded valve adjuster clacking. I would use a lighter grade oil in winter to avoid this and a heavier grade in summer to keep the oil pressure up.

Enjoy your car!
Andy

95 NC 993

Mobil 1 15w-50 here. Recommended by a respected used Porsche dealer with a long history including racing (Holt). That's good enough for me and you can find it at Walmart for reasonable in 5 quart size.

Edward

I switched from Mobil1 15w/50 to Mobil1's TDT 5w/40 just because of all that I had read regarding the weight of the oil where "thinner" does the job that "thicker" will do, but better (gross oversimplification, I know. But I dont want to rehash that again). The TDT 5/40 has very nearly all the positives of the 15/50 but at a lighter weight ...better for daily street use.

FWIW, I use the Brad Penn for the Trackmeister (82 SC), as it is very highly recommended by those "in the know." The reason I choose not to go with the BP in the 993 is I don't want to risk compromising cat life (pricey!!), whereas the M1 TDT oil offers good ZDDP numbers for health and longevity.

Add to all the above with the fact that M1 is easy to get and reasonably priced. In concert with prudent oil/filter changes, I think my engine will be happy for some time.

Edward

CADguy

My mechanic has switched from Mobil 1 to Redline (can't remember viscosity) for air-cooled Porsche oil changes, due to Mobil 1's reduced ZDDP level.

Here is a good (if long!) article from LN Engineering talking all about engine oil for air-cooled Porsches:

http://www.lnengineering.com/oil.html

Don't cheap on the oil , it's the life blood of our cars!

TargaTango

Multiple choice:

a) read your Porsche manual, and look at Rennlist for the nice pictures and increase your Rennlist post score by participating in what is your favourite Porsche color poll; or

b) read Rennlist for some very practically informed advice.

Tough choice but I went with b). This is Rennlist at its most valuable, to give a person with no mechanical and industry knowledge some very informed views. I much appreciate Charles' and Steve's advice. Unfortunately I cannot get these brands in Hong Kong, and thanks to Charles' kind recommendation I am very happily using Motul 300V 15W-50.

Happy driving,

skywachr

FWIW and extra peace of mind Steve loves Motul as well.

helmet155

Yep Motul is on the list, just pricey compared to the others I mentioned.