axl911

Have you guys seen this?

Porsche issued a bulletin not recommending this weight of oil!

http://www.pca.org/tech/tech_qa_question.asp?id={34806DB8-D9B5-4009-A164-5AB49431B447}

Flying Finn

Interesting... I'm sticking with 15w-50 tho.

Edward

Though this may be the "official" dictum by the powers that be, this issue has been discussed many times over in the past. From what I've gathered, it "seems" that the motive is so that PAG can limit their "recommendations" (and liability) to one product and thus limit their "work," as it were. No more need to ask about climatic conditions, driving conditions, what year 911 you own, or the like. Nope, just use this one brand and weight, change it every 15K miles, and you'll be fine. Right. Yeah. Sure.

Reiser's response accurately notes that one's climate should be considered when determining one's choice of weight. And of course, that silly little point about whether one has hydraulic lifters or not! My own opinion is PAG has almost completely abandoned it's desire to support anything prior to the 9x6 models, and this recommendation ("revelation") of 0w/40 is evidence of that. Tighter tolerances in the wasserboxer and cold-climate users (under warranty) results in more service personnel "fixing" their "problems." So easy fix: recommend one size-fits-all and everything is good! Yeah. Right. Sure.
...rant off

Edward

Dan V

I'm confused! My car has gone over 60K miles, exclusively on 15W50, and hyrdralic lifters are quiet and seem to work perfectly, even when cold in the morning. Anyone here think 0W40 would be better?

C4S_fan

<grumble> This morning I picked up 2 cases of 15W50...

rcwelch

Dennis...your just fine. Where did you go for the oil...any good deals? BTW, how is your flush going...got it back together yet. Let's get Scott for coffee this weekend.

Anir

Reminds me of the South Park episode about global warming....

"OMG, it's global warming. Run for your lives!"

Bill Verburg

I have always used M1 15w50, but recently switched to M1 5w40 for street use, saving the 15w50 for track use.

I can't saty that I have noticed much if any difference, but the cars are only driven on nice warm days.

Now my S4 gets M1 0w40, it needs it

C4S_fan

Flush is nearly finished... need to button it up and do an oil change. Should be finished tomorrow! <fingers crossed>

Coffee sounds good!

Traffic53

i also use 15-50 at oil changes. but in the chicago winter, i top off with 0-40 when necessary

rcwelch

Dennis...PM me your phone #'s again, I had to replace my cell phone and all my numbers went with it...Let's try Sunday morning if you are finishing tomorrow. Good luck, sorry I can't come over and help, but my daughter gets in for the Thanksgiving week.

c993k

It all depends on where you live. Try starting a 993 in Detroit during Jan-Feb with 15-50.
Your starter will beg you to drop viscosity.
Now if you live in South Florida, 15-50 is way.
BTW in bike racing, Lower Viscosity=Higher HP and Quicker Rev ups. Chris

DarrylH

OK what the heck I'm gonna chip in here. I know Castrol seems to be a dirty word on at least some of the forums but Castrol Syntec 5W/50 seems like a good possible option. It's on Porsche's approved list, last I checked. There's some question about whether the 5W is for real, the 50 seems to be accepted as the real deal, but you guys with hydraulic lifters in cold climates might wanna consider it. I switched my 130k+ 964 to it from dino Castrol 20W/50 a while back, no increase in leaks, some small decrease in running temps at speed, no hydraulic lifters to worry about so no data there, but so far I'm content with the change. No affil, no nuthin', just one guy's opinion. And it does get cold here.

linust

check out http://www.bobistheoilguy.com/

csertich

Steve Weiner recommends 20/50, except in cold climates. He has a great deal of experiencing in rebuilding these motors. He is highly respected on this board.

chuck