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Originally Posted by swftiii
Racer,
Great comments and questions.
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- Thanks
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Originally Posted by swftiii
I use Mobile1 15-50, which is Porsche factory installed oil.
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You might try 20-50 during the hot summers
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Originally Posted by swftiii
I change the oil every 7500 miles (instead of the factory suggested 15000 miles) or every spring (before the season).
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I would recommend more frequent changes during the DE season. While mobil 1 has greater resistence to break down, I was changing my oil twice per DE season (April-Oct) when my SC was running 240-250 temps. $100 for my shop to do oil/filter change with Mobil1 20-50 was a lot cheaper than saving for a new motor
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Originally Posted by swftiii
The factory oil cooler is in front of the front passenger wheel and there is only one way to increase air flow and that is by overriding the oil cooler fan. I have already set this up so I can switch it on High at the track and it helps cool the oil down quickly after a run, but doesn't really help during the session.
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I know on some 993's widebody folks replace the foglights with ducts, but I can't remember if they are brake or cooler ducts.. may want to also look into that.
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Originally Posted by swftiii
All the thermostats are working correctly and others in 993s get similar oil temps..
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Just to play devil's advocate... how do you know? Have they been pulled and inspected? Have you been able to put a pyrometer on the lines and see a difference in temps between the two lines before and after they go through the cooler?