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I’m doing my first oil change on my 04 986-57K miles. I live in bethel Connecticut. In my trunk there is a Mobil 1 sticker. I’m getting mixed reviews on the viscosity and brand of synthetic oil. One group of friends “owners” are telling me Mobile 1 European 0-40. My neighbor who had his 911 serviced by Danbury sport group Speed Sport Tuning uses only Liquid Moly 5-40. In your experienced opinion what do you suggest or not a big difference. Thank you 

Edited by Ubuster1
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I chose to stick with Mobile1 0-40. Never had any issue, never used more than 1/2 liter between changes. Only sent one sample in for testing which showed that the oil was good for a lot more miles/time.


I never got around to trying the Joe Gibbs DT40, but it's the only other one I would be willing to try.

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  • 1 month later...
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18 minutes ago, lkchris said:

  Viscosity is irrelevant.

Not remotely correct in is this world.  But I would agree that Porsche's A40 spec is irrelevant as it is a marketing tool, not a lubricant specification. 

If you want real specs, consider products that meet or exceed ACEA A3/B3/B4, which are real, technically based and widely accepted performance standards.

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