Quote:
Originally Posted by gpshumway
PQI America recently tested Pennzoil Yellow Bottle 5w20 and got a NOACK of 6.5%(!) so apparently SOPUS had some extra GTL base stock lying around.
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Easy there. Solarent and Molakule on bitog (oil blenders,as you know) have actually stated that it's possible to achieve a good NOACK in a mineral oil without synthetic base stocks.
Although Pennzoil says:
11. The recent voas of Quaker State and Pennzoil conventional 5W-20s show extremely low NOACK. Are these oils getting GTL basestocks as well?
Quote:
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At the moment PurePlus™ Base Oil will primarily be used in our Pennzoil Platinum® line of products. However, in the future other engine oils in our portfolio may contain a percentage of PurePlus Base Oil, if required for a specific formulation. Products in the remainder of the Pennzoil portfolio will broadly continue to use conventional base oils as their primary base oil type.
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http://www.bobistheoilguy.com/pennzoil-q-a/
Key words, "At the moment", "primarily", "may", and "percentage".
Unfortunately, Mobil1 does not list NOACK.
-Dennis