Suitable oil for Air-Cooled Porsche(Especially 964,993)

[595_PP2]

Thank you for your good advice.

I think 40-50 grade is good too.

However 0W and 5W feel slightly thin.

Japanese oil manufacturers also sell high quality oil, but the price is very high compared to the USA and Australia.

Even if shipping costs are applied, I can import it cheaper than Japan, so I am importing oils from overseas.

 

[BrocLuno]

In that case Penrite is your friend. I'd have no qualms about running their better oils in anything. PM Shannow and SR5 and ask about what they think ... If it's just being street driven, they may have some insight as to the best Penrite to use ...

Penrite 10-10ths is a fine racing oil. Motul is cheaper here, so I don't use it, but they make some great lubes

So print out the A40 list from Porsche and compare those to the Penrite catalog

 

[Shannow]

The two Penrites with A40 are both 5W40s.
Enviro 5W40 (also C3 and Dexos 2)
HPR5 (A3/B4 and A40).

The 10-tenths 15W15 doesn't carry the specs
https://www.penriteoil.com.au/products/10-tenths-racing-15w-50-100-pao-ester

 

[595_PP2]

Every weekend I am running the syuto-kou(Metropolitan Expressway).

So I think HPR grade is enough for me.

In Japan, Motul's 300V is 1 liter and the list price is about 35 US dollars.

Maxima and Torco are also concerned about the product, shipping in Japan takes time from the United States.

On the other hand, shipping from Australia to Japan was very fast.

Even HPR 10 felt thin vision at oil change, so if I am HPR 5 I'm a bit worried about oil leakage.