Peak say's they use a full synthetic Base Stock, maybe they are applying they are at least mainly a PAO base. In addition what is overlooked is the base stock makes up the 80% of the oil, and if that base stock isn't as good, than of coarse you have to change your add pack to make up the difference. Is this an extended drain oil, probably not. But I would run it for 6,000 miles easily, but I have yet to find it for the price I want it for. Like a previous guy mention above..I can get Napa Synthetics cheaper and I know it should go 6,000 miles.
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