DDK - Die Deutschen Klassiker

Planning 1st oil change after engine general overhauling.
I would appreciate your recommendation for oil type & brand.

thank you

Valvolene vr1 20/30 mineral oil

hot66 wrote:Valvolene vr1 20/30 mineral oil

many thanks for your prompt response.

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I think James meant 20/50 - & it's Valvoline.

Always used that oil in my 911 engines ...

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I am using this at the moment, in both my cars.

Morris Golden Film SAE 15W-50 Classic Motorsport oil - Comes in a "handy" 25 litre drum and has a high ZDDP content

I have done a couple of rallies with it, no issues and it maintains good oil pressure and temperature it still drips out of the Targa engine just as fast as any other make of oil though

Another option: (Anglo America Oil Company) Driven HR1 15W-50 which now available in 5 litre cans (previously only came in 1 US quarts!)

John

Lightweight_911 wrote:.

I think James meant 20/50 - & it's Valvoline.

Always used that oil in my 911 engines ...

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I did .. i'll blame it on tired typing fingers

Used it for maybe 15 years in the 2.4S . I'm about to start using it in the 964 too

Sorry to continue to flog the synthetic oil horse but synthetic oil are superior to mineral oils in very way. I would suggest any good 10/40 will be better than a mineral 20/50. Most damage during startup occurs when the engine is cold.

If in doubt read Which Oil by Richard Mitchell a 912 owner

I use Smith and Allen but the Mobile 1 is ok.

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most synthetics dont have the zinc levels. I've gone with Valvolene VR1 after many recommendations from different Porsche and VW engine builders and their experience when building and stripping race engines

re weights of oil etc .. even if you think something .. Porsche themselves think otherwise

https://www.porsche.com/uk/accessoriesa ... /motoroil/

it is also a mineral

For all 356, 914 and 911 models up to the 2.7-litre G-Model, Porsche recommends the multi-grade version with a viscosity of 20W-50. Back in the 1950s, 1960s and 1970s, engines were built with much more generous tolerances than today, which is why the viscosity of an oil must be low enough for it to penetrate into all areas of the engine as quickly and uniformly as possible during cold starts. At the same time, however, its viscosity must not be so low that a stable lubricating film is no longer present when the engine heats up. The developers went to particular lengths to achieve excellent cold start properties for the oil, so that the engine can be lubricated as quickly as possible when started. The CCS test was especially important in this respect, since it simulates the behaviour of the oil in the crankshaft bearing during cold starts and at low temperatures.

The Porsche Classic 20W-50 is a mineral oil known as a hydrocracked base oil with mildly alloyed additives. Hydrocracked base oils are characterised by a very low level of contaminants, a very low sulphur content and very good oxidation and ageing stability, which prevents deposits, for example. At the same time, the Porsche Classic Motoroil 20W-50 has an extremely high HTHS viscosity (High Temperature, High Shear), which describes the quality of the engine oil at high temperatures (150 °C) in the lubricating gap and with high shear rate (engine speeds). Finally, the excellent shear stability ensures that the optimum lubricating properties are reliably retained at high engine temperatures, even after long periods of operation and under high loads.

In a nutshell: low levels of deposits (at both hot and cold temperatures), optimum care for classic engines and excellent compatibility with the special materials found in these engines such as cork seals or leaded bearing shells.

20W-50, 1 litre: Part no.: 00004320928
20W-50, 5 litres: Part no.: 00004320929

I will just say read the book. Richard takes on each of those points

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