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Registered User
Join Date: May 2014
Location: Baltimore, MD
Posts: 104
Porsche Classic 10w-60 Motor Oil -

Hi Folks,

I know the "good ole" oil discussion for the Porsche...

But I recently switched to using the Porsche Classic 10w-60 oil for my '88 Turbo (original engine w/ 56K miles). I had been using 15w-50 Mobil for the last 8 years.

The car always smokes (the initial puff) at start-up and I always observed a few/minor oil dime-to-quarter spot sizes on the ground after usage - while driving throughout all seasons in the Mid-Atlantic region. But since I changed to 10w-60, I no longer see the smoke at start-up and oil leaks after turning the engine off.

Granted, I have only been driving the car during the summer (temperatures) since the oil was changed, so I assume the higher viscosity at higher temperature helps to mitigate the leaks (not sure how it would help suppress the smoke at start-up).

Perhaps during the winter months, I will once again see the return of small oil leaks, with the lower oil viscosity at lower temperatures. But I will stick to the 10w-60 oil, since the car gets driven more during the warmer temperature months anyway.

Needless to say, the car seems overall happier with the Porsche Classic oil

Have any folks switched to 10w-60 and can confirm these observations?



Last edited by hcalvani; 08-05-2018 at 06:48 PM..
Old 08-04-2018, 07:12 AM
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Uwon's Avatar
Join Date: Jan 2011
Location: Ontario, Canada
Posts: 1,363
Interesting. Anybody else have any experience?
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2006 C2S, A4 Quattro, the RST hot rod-
Old 08-05-2018, 05:53 PM
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T77911S's Avatar
Join Date: Oct 2006
Location: MYR S.C.
Posts: 11,301
never heard of it.
not sure I would put a 60 weight oil in.
if it is NOT synthetic I would definitely NOT put it in.

the heat from the turbo, especially in summer time is too hard on dyno oil. oil break down is one issue but you will also get coking in the turbo, eventually the pieces will break off and can clog oil ports.

unless it a hi mileage oil that may treat seals and stop oil leaks is one thing, but I would be cautious of it stopping leaks and smoke at startup.

I could live with smoke at startup for an oil that is taking care of the engine.

I would stick to amsoil or mobile 1.
86 930 42kmiles [__] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD
88 BMW 325is 200K+ SOLD
05 BMW 330CI 130K:: [__] RUNNING: [__] NOT RUNNING:
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Old 08-06-2018, 04:12 AM
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jsveb's Avatar
Join Date: May 2007
Location: Norseman territory
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AFAIK it is synthetic. Please correct me if I am wrong - looking to change oil on the 930, but there isn’t too much avail. here in dk.
Carrera 3.0 1975
930 1978 OEM Matte Schwartz, ANDIAL IC, BL WUR, SC cams. LMA-3 w. XD-16 and CP transducer
Old 08-06-2018, 08:46 AM
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 8,726
Reading the description, they state newer oils are technically better, and have better detergents:

"Although modern oils are better from a technical point of view"

Crazy they'd state that...

This is my take from the excerpt from their website:

1. Old motor - use the Porsche 10W-60 (less detergent to mitigate creating leaks and higher oil pressure)

2 New motor - use modern oils and don't look back
Cory - turbo'd '87 C3.2 Guards/Blk, 3.4, 7.5:1 CR P & C's, soon to be 993SS cams and GSXR 750 ITB's fed by 964 intake, Borg-Warner S366 turbo @ 1.4 bar, Treadstone full bay IC, TiAL F46 WG, HKS 1 1/2" BOV, twin 044 pumps, MegaSquirt 2 (v3.57 board) w/EDIS, Tramont wheels (285's rr, 225's frt), Big Reds frt, 993 rr., tower brace, MOMO wheel
Old 08-06-2018, 09:19 AM
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