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Used Oil Analysis On 991

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Old 02-03-2021 | 12:32 AM
  #121  
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Here's mine.
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Old 02-03-2021 | 12:59 AM
  #122  
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Originally Posted by polobai
Here is mine after my annual service. Mobil 1 5w-50 and just over 2k on the interval. Glad to see the wear metals went down as expected and happy things are all in spec. This change had the bmc air filter in place-same silicone content as the sample before so that means that it’s filtering just as well as stock (IMO)



Good report
nice and you are running pretty high hp as well, correct?
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Old 02-03-2021 | 01:17 AM
  #123  
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Yes sir, 466whp is what it put down the last time it was on the rollers.
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Old 02-03-2021 | 10:35 AM
  #124  
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I’ve used Blackstone for years on piston aircraft engines. I love seeing the oil trends & knowing that I have a healthy engine.

Thanks for doing this @LexVan
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Old 02-03-2021 | 12:28 PM
  #125  
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Originally Posted by Wolpertinger
Here's mine.
Good viscosity numbers.
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Old 02-03-2021 | 12:31 PM
  #126  
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Originally Posted by Carl Over
Good viscosity numbers.
I switched to Liquid Moly Leichtlauf 5W40 from Mobil 1, and I swear the engine got quieter and smoother. Maybe all in my head, I don't know. This is my first report.
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Old 02-03-2021 | 08:32 PM
  #127  
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Heres mine at 70K using Motul 8100 Excess 5-40. Switched to Mobile 1 5-50, interested to see the next report.
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Old 04-04-2021 | 02:10 PM
  #128  
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Rennlister @Norge911 this is how you want your Blackstone UOAs to read.
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Old 04-05-2021 | 08:38 AM
  #129  
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A bump for Rennlister @Reo_991T
Last edited by LexVan; 04-05-2021 at 11:37 AM.
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Old 04-06-2021 | 09:34 AM
  #130  
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I just wanted to post this in this thread to add to the pool of UOAs.

My last one is attached. I switched to 5W-50 M1 with this drain (I'm in FL) and it will be interesting to see how things change next Feb.


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Old 04-06-2021 | 10:39 AM
  #131  
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Thank you LexVan! Very helpful and appreciated as I begin my Porsche journey..!
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Old 04-06-2021 | 09:37 PM
  #132  
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Okay I’m sold on the switch to M1 5W50 from 0W40. Where is everyone finding the best price?
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Old 04-06-2021 | 10:06 PM
  #133  
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Originally Posted by FlintGTS
Okay I’m sold on the switch to M1 5W50 from 0W40. Where is everyone finding the best price?
Napa has 5.99/qt sales. Might coincide with Mobil rebates also. No 5w50 in 5 gal jugs.
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Old 04-06-2021 | 10:07 PM
  #134  
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Originally Posted by FlintGTS
Okay I’m sold on the switch to M1 5W50 from 0W40. Where is everyone finding the best price?
Generally keep an eye out for one of the periodic NAPA online sales. I’ll go look but I think I paid around $6 a quart.

Edit: $5.79/quart, 16 quarts, Mar ‘20.
Last edited by Rich_Jenkins; 04-06-2021 at 10:10 PM.
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Old 04-06-2021 | 10:12 PM
  #135  
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