And yet you cite UOAs as your only source of data. And are you saying you know exactly when ExxonMobil transitioned away from a higher-PAO formulation for your comparison? You do know that for flagship products it has never been 100% PAO, nor is it 0% PAO today.
ExxonMobil did a pretty good piece on VISOM citing 0W-40 data. If you read through the presentation they show that some parameters are worse yet some are better. And from a performance standpoint they can (and do) make the claim that some key aspects are superior.
http://www.motor-talk.de/forum/aktion/Attachment.html?attachmentId=695007
Originally Posted By: deven
Originally Posted By: kschachn
You are correct that the reason ExxonMobil went to severe hydrocracking from a majority PAO based oil was cost, but they have shown that the performance is nearly identical (and superior in some aspects).
You have any hard data to back this claim up because I'd love to see it and by this I don't mean UOA's as in my book they dont mean much. I am looking for tear downs and micrometer measurements of engines using Mobil 1 oils when the were PAO and when they were not. Heck I have even followed the UOA's of Mobil 1 before and after using Gp III synthetics and in many UOA's the iron numbers have gone up after they changed to Group III. But I am really interested in your evidence of tear downs. Thanks.
ExxonMobil did a pretty good piece on VISOM citing 0W-40 data. If you read through the presentation they show that some parameters are worse yet some are better. And from a performance standpoint they can (and do) make the claim that some key aspects are superior.
http://www.motor-talk.de/forum/aktion/Attachment.html?attachmentId=695007
Originally Posted By: deven
Originally Posted By: kschachn
You are correct that the reason ExxonMobil went to severe hydrocracking from a majority PAO based oil was cost, but they have shown that the performance is nearly identical (and superior in some aspects).
You have any hard data to back this claim up because I'd love to see it and by this I don't mean UOA's as in my book they dont mean much. I am looking for tear downs and micrometer measurements of engines using Mobil 1 oils when the were PAO and when they were not. Heck I have even followed the UOA's of Mobil 1 before and after using Gp III synthetics and in many UOA's the iron numbers have gone up after they changed to Group III. But I am really interested in your evidence of tear downs. Thanks.