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M1 0w40, 7400mi, Porsche 911 C4s 3.6L
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What happened? The title looked very interesting. 
Sorry, my cell phone number and my email were on the picture.
Not like anyone would spam me.. But yeah.
Not like anyone would spam me.. But yeah.
Nice report. Have you always used M1 0w-40 in this car? Any track time during this interval?
I was about to ask, any track/autocross/DE/TT events? Looks great!!
Yes. Dealer oil/filter.
Just street driven, mostly high way miles. However, I put my radar detector to good use.
that iron looks awful high
With TBN of 4.4 after 7400 miles, the OCI can be extended to 10-12k miles. The recommended OCI is up to 20k miles since model year 2005, I think M1 0W40 is toasted at 15k miles according to this UOA. Why Porsche is recommending such long OCI ? Which oil can lasted that long in such a high performance engine ?
Dealer filter. Not sure what brand.
I think Porsche lowered it to 12k/1yr now. These vehicles hold a lot of oil. 9-10qts is a lot of oil so longer drain intervals are doable.
15k seems to be about the max you can go with most synthetics. SSO, S3k & D1 are good for a lot more with large sumps in diesels but the others seem to loose it around the 15k mile mark unless all other variables are practically perfect. Still, oil is relatively cheap and getting 10k out of any oil is good considering most people drive 12k/yr.
15k seems to be about the max you can go with most synthetics. SSO, S3k & D1 are good for a lot more with large sumps in diesels but the others seem to loose it around the 15k mile mark unless all other variables are practically perfect. Still, oil is relatively cheap and getting 10k out of any oil is good considering most people drive 12k/yr.
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