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Old Feb 16, 2013 | 08:50 PM
  #21  
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I spent an evening on bob the oil guy reading results from fresh oil tests along with fresh vs used oil tests a few years ago. One of the best "widely available" reasonably priced oils was Penzoil Platnum. I remember reading results of oil being tested after 6-10k miles wear and it still meeting minimum requirements for new oil, and still testing better than some new oils. Was enough to sell me on it. I use it in all my vehicles and change every 5k in my Bird and Yukon and 7500 on the old ladies ecotec which see's ALOT of highway miles.
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Old Feb 16, 2013 | 10:50 PM
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Yet you will still find folks who will tell you Penzoil will sludge up and engine. So few people care about actual data.
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Old Feb 17, 2013 | 02:17 AM
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Originally Posted by formulaon18s
I spent an evening on bob the oil guy reading results from fresh oil tests along with fresh vs used oil tests a few years ago. One of the best "widely available" reasonably priced oils was Penzoil Platnum. I remember reading results of oil being tested after 6-10k miles wear and it still meeting minimum requirements for new oil, and still testing better than some new oils. Was enough to sell me on it. I use it in all my vehicles and change every 5k in my Bird and Yukon and 7500 on the old ladies ecotec which see's ALOT of highway miles.
Yup, I swapped all my vehicles over just to test what I was running (Mobil & Valvoline) against the PP. What I got back from Blackstone was quite enlightening and since then I have been running PP in all of my vehicles. I even added another 2k to my service intervals with the PP vs the 5k I was changing it at just to see the results, and they still surpassed the Mobil readings when I was changing it at 5k. Mobil is vastly overrated imho and I will never use their products again. I also noticed that in my wifes Acadia with the DI 3.6, the Mobil would use ~.5qt oil every 3k and at ~6.5k would build a slight amount of sludge which I was assuming due to particulate matter and fuel wash getting in the oil from the DI. Thus far, the PP uses ~.3-.4qt @7k and sludge/fuel wash issues have abated and it showed in the lab reports. I'm assuming the PP does a better job at aiding in ring seal. Either way, I'm sold on it and it's cheaper so I'm happy. Just my .02
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Old Feb 17, 2013 | 02:21 AM
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Originally Posted by bww3588
Synthetics have better lubrication properties, therefore they protect better. Period. It's a well know fact
It's the amount of heat they can withstand before breaking down, that is what separates them from regular oils.
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Old Feb 17, 2013 | 06:01 AM
  #25  
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Are the molecules of synthetic oil "smaller" than the molecules of conventional oil like I have herd? To the tune of 1/3 the size of a convertional molecule is what I remember hearing

...and Dr W, that was a good bit of info there. I have spend countless hours on this bloody interweb thingy, and have never seen anything like that list anywhere before
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Old Feb 17, 2013 | 07:55 AM
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should be a sticky lol
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Old Feb 18, 2013 | 10:59 AM
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[QUOTE=MMWS6;17154334]Are the molecules of synthetic oil "smaller" than the molecules of conventional oil like I have herd? To the tune of 1/3 the size of a convertional molecule is what I remember hearing

No they are not smaller, they link together in a chain like configuration. That is why they protect better under extreme conditions. The molecules are less likely to break apart at the microscopic level.
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Old Feb 18, 2013 | 02:08 PM
  #28  
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i would be concerned about valve seals with 6k oil change intervals .I know higher zinc levels are needed for flat tappet cams ,what about roller cams ?
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I was running Royal Purple in the road course car the HPS oil, I beat it up pretty good and got decent UOA back on it.

I did some reading on Pennzoil Ultra Euro, so I called Shell/Pennzoil and asked them about what oil to run in the car and they told me to run the Euro 5-40 so I ordered some off of Amazon and currently have it in the car.


Indycars use this exact oil straight out of the bottle.


After this weekend I will change it as it will have 4 track days on it and send it to Blackstone.
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