991.1 Bore Scoring
#31
#32
Rennlist Member
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The first one we fixed was in 2011 - a 2009 C4S from Kuwait:
![](https://cimg9.ibsrv.net/gimg/rennlist.com-vbulletin/640x480/2009_porsche_targa_4s_cylinder_reconditioning0003_32aeb61ab6d89a05a532f878e3c291c3840b4a87.jpg)
![](https://cimg1.ibsrv.net/gimg/rennlist.com-vbulletin/640x480/2009_porsche_targa_4s_cylinder_reconditioning0004_495ac21e7bb23f2e59163295fbd4f3ddfac4bdc8.jpg)
![](https://cimg2.ibsrv.net/gimg/rennlist.com-vbulletin/640x480/2009_porsche_targa_4s_cylinder_reconditioning0005_ec5cf73450b7baac0a28023c16a0acbf267b1a7d.jpg)
Sorry I don't have better pics - these were the ones the customer sent me years ago.
#34
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I will never understand why Mobil 1 is constantly bashed and blamed at least partially for many of these Porsche engine maladies yet Porsche continues to use it as factory fill and has done so for over 20 years.
If it was truly as inferior as some believe then Porsche wouldn’t be using it period.
If it was truly as inferior as some believe then Porsche wouldn’t be using it period.
#35
Rennlist Member
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I will never understand why Mobil 1 is constantly bashed and blamed at least partially for many of these Porsche engine maladies yet Porsche continues to use it as factory fill and has done so for over 20 years.
If it was truly as inferior as some believe then Porsche wouldn’t be using it period.
If it was truly as inferior as some believe then Porsche wouldn’t be using it period.
#37
Rennlist Member
#38
Rennlist Member
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dont idle car, especially when cold and extra fuel is injected. Start car and start driving with low rpm
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#39
Instructor
Thread Starter
#40
#41
Rennlist Member
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I liken the difference to the A40 M1 and C40 M1. The C40 is formulated to prevent LSPI and also has a higher HTHS viscosity, however that's where the similarity ends, as the C40 is designed as an emissions protection formula and by that token, can't be full SAPS.
#42
Racer
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I will never understand why Mobil 1 is constantly bashed and blamed at least partially for many of these Porsche engine maladies yet Porsche continues to use it as factory fill and has done so for over 20 years.
If it was truly as inferior as some believe then Porsche wouldn’t be using it period.
If it was truly as inferior as some believe then Porsche wouldn’t be using it period.
#43
Burning Brakes
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My car is 2013 Carrera S. I just changed oil last week.
#44
Rennlist Member
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The label recommending Mobil-1 is not based on oil performance but how much the Exxon advertising department pays to have Porsche and other manufacturers put the label on their cars. Some owners believe Mobil-1 is the sacred cow of oils and use it despite there being a long list of Porsche approved oils by other manufacturers. Replaced engines under warranty is chump change compared to what Porsche gets paid by Exxon.
#45
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One could just as easily say that Motul, Driven , Liqui Moly etc. etc. have their own marketing agenda and campaign to dethrone Mobil 1 in order to make room for their products in a somewhat cornered market.
Porsche has placed it's reputation on Mobil 1 for decades and it's insane to think for a second that they would risk that for the sake of some kick back. As far as I know there is ZERO evidence that Mobil 1 is causing any early or abnormal engine wear in street driven vehicles and the speculation otherwise should be looked at with far greater scrutiny.
The following 5 users liked this post by limegreen:
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