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type of oil to use in 996 in winter

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If I'm not mistaken, the factory fills these engines with Mobil 1 0W-40. This oil is good for temperatures below -30°F. Although you could, I don't see a reason to switch to 15W-50 during the winter. Seems to me, you want to use that more in warmer climates as it is more suitable for temperature above 80°F.

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I use Mobil 1 10W30 year round here in the south. It's the same that my dealer uses and recommends. I use it because it's widely found in just about all stores. I don't track or run my car hard and a thicker oil would be used for tracking in extreme hot weather environments such as the desert in August. :drive:

Edited by WARDHOG
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I use Mobil 1 10W30 year round here in the south. It's the same that my dealer uses and recommends.



I would NEVER use Mobil 1 10W30. I've explained the reason here:

My diatribe on 5W30

The exact same argument applies to Mobil 1 10W30. It is only ACEA A1 and A5 approved, but not A3, which is what matters for P-cars. The main reason why it is not approved is that the HTHS viscosity is only 3.17 mPa.s, which is too low. Also, 10W30 gets very thin at high temperatures, even thinner than 5W30 of 0W30.

Put in 0W-40, and you are fine.

FWIW, I wouldn't follow dealer oil recommendations, unless they are backed up by written Porsche approval.



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