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Penrite Oil HPR Gas 20W-60 (Mineral) has been discontinued. See the Best Engine Oils.
Daniel A
Daniel AVIC5 posts
  Gas 20W-60

Great Oil For Classic 911 – I purchased a classic 911 last year, which was quite clearly in dire need of a service. One of the first things I changed was the engine oil. Going by previous service receipts, I could see that previous owners were using a Synthetic oil, without any Zinc content! These cars have a flat tappet design, so a high Zinc content (1600 ppm) for… Read more ·  1

engine protection is a must.

Maybe it's just my imagination (I think not) but the car runs a lot smoother now, and the 20W-60 gives a bit more protection than what Porsche specify.

So for me, it's overall a great choice, and I'm happy to use an Australian product as well.

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