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StienbargerR · Joined: 28 Oct 2005 Posts: 1362 Location: Richmond, IN

Hey Guys,

Im done with College for this year finally and I had time and money to spend on my car. First thing I did was go out and buy a few new things- An Optima Battery, and a Performance oil filter and synthetic oil (freshly rebuilt engine) And man, does my car run smoother! I also got a new ground strap and some special battery terminal connectors. I just wanted to post this because it may help someone out. It seems like the car just runs better in general. Moral of the story is pay a little extra for nice oil!

Ryan
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1978 924 NA
-250lb lowering springs, Euro Pistons

-nick · Joined: 16 Nov 2002 Posts: 2699 Location: Cambridge, MA

Just how "freshly rebuilt" is this engine? Synthetic in a new rebuild is absolutely the worst thing you could do.
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1980 931S
15psi boost, MS-II, EDIS, 951 IC, custom intake, Ford 5.0L throttle body, Forge BOV, WB o2, G31 w/LSD, 964 wheels, 968 rear sway, Bilsteins, 200# Welt. springs. A laptop, and a partridge in a pear tree.
1991 964 C4 Cabriolet

StienbargerR · Joined: 28 Oct 2005 Posts: 1362 Location: Richmond, IN

It was rebuilt a few months ago. I had non synthetic in it prior to today. Im not exactly sure what the mileage is though. What is so bad about it? Oil seepage? I am fairly certain that all the gaskets are properly settled in ect.

Ryan
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1978 924 NA
-250lb lowering springs, Euro Pistons

StienbargerR · Joined: 28 Oct 2005 Posts: 1362 Location: Richmond, IN

Nick,

Pennzoil begs to differ. http://www.autocarepronews.com/default.aspx?type=art&id=86055&
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1978 924 NA
-250lb lowering springs, Euro Pistons

chrisjames654 · Joined: 25 Apr 2008 Posts: 35 Location: Pensacola, Fl

^^ good article.

-nick · Joined: 16 Nov 2002 Posts: 2699 Location: Cambridge, MA

Good article? It's promotional propaganda straight from the advertiser's mouth; which happens to run contrary to every ring manufacturer. Synth is too slippery for rings to seat.

Don't switch until you have a good 5k+ miles logged. Deves is making me wait 10,000 miles. Direct from the manufacturer's mouth.
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1980 931S
15psi boost, MS-II, EDIS, 951 IC, custom intake, Ford 5.0L throttle body, Forge BOV, WB o2, G31 w/LSD, 964 wheels, 968 rear sway, Bilsteins, 200# Welt. springs. A laptop, and a partridge in a pear tree.
1991 964 C4 Cabriolet

dpw928 · Joined: 02 Nov 2002 Posts: 1860 Location: owasso, ok 74055

I wouldn't trust Pennzoil for accuracy or product liability. Concerning breakin, go with dino oil as the ring manufacturer recommends. Some rings are coated for fast break in and some aren't. The myth about synthetics can be true if you have bad seals but used a dino oil like Pennzoil with A7 additive. This forms a sludge around the seal so when a synthetic (with stronger detergents) is added the sludge goes away and the seals leak.

BTW many engine rebuilders in this area will void the warranty if Pennzoil (any type) is used. My one and last experience with Penzoil resulted in a burned out turbocharger when they marketed a Turbo oil. They ended up pulling the "turbo" oil from the market but not honoring any warranties.

Can you tell I don't like Pennzoil?

Dennis
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81 931 5 sp
78 928 5 sp Silver
78 928 AT Euro Black

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

And while it's on the table, a Double Dookie goes out to Quaker Crud.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

StienbargerR · Joined: 28 Oct 2005 Posts: 1362 Location: Richmond, IN

Nick,

Are you saying that synthetic is conducive to blow by? I may call the guy who rebuilt my engine and talk to him about it.

Ryan
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1978 924 NA
-250lb lowering springs, Euro Pistons

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

He's saying its potentially too slippery to allow for proper seating of piston rings during engine break-in.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

Martijnus · Joined: 29 Dec 2006 Posts: 2019 Location: Netherlands

can't wait to feel my freshly rebuilt engine... It HAS to make a difference, or else rebuilding is worthless

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"Rule: Turbo's make torque, and torque makes fun." (C. Bell)

924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Well, surely you diagnosed an issue with your motor before tearing it down. . .right?
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

StienbargerR · Joined: 28 Oct 2005 Posts: 1362 Location: Richmond, IN

My car had really high mileage, and I wanted it rebuilt with Euro pistons, I planned to rebuild it last summer, but then it threw an alternator belt and overheated. I figured it was time to just do it then

Do you guys have an article or something to back up your argument? I have read what you have said about synthetic in a few places, BUT, I have not seen any evidence that supports the idea.

Furthermore, why are car manufacturers putting synthetic in their cars? technology is different now I know, but is there something different with the way they hone the cylinders or something?
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1978 924 NA
-250lb lowering springs, Euro Pistons

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Cedric · Joined: 27 Aug 2004 Posts: 2831 Location: Sweden

eeh, what exactly do you meen by "slippery". Sounds like a synthetic oil myth. But on the other side of the pond people seems more sceptic

I cant actually see why you would run mineral oil, except for the price ...
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1980 924 Turbo
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